Roger Federer says he hopes to return to action by the end of the summer, with his recovery from knee surgery likely to rule the 20-time grand slam winner out of Wimbledon.

The 40-year-old underwent surgery on his right knee for the third time last August, and has missed five of the last seven grand slams.

Federer made the quarter-finals at Wimbledon last year, but coach Severin Luthi recently said that he "can't imagine" the eight-time Wimbledon winner featuring in London this summer.

Federer has now provided an update on his recovery to Swiss broadcaster SRF, saying that the end of summer or start of autumn is a realistic target for his return, which could mean he is back for the US Open that starts on August 29.

However, he feels "positive" about his return to the court whenever that comes.

"It will certainly be a while," Federer said. "The end of the summer, early autumn, [that's] where I'm aiming for a comeback.

"It's [the knee] fine. Much better. Obviously, I was on crutches for two months, so you have to start from the bottom.

"It [the surgery] was certainly the right thing to do, the knee wasn't right after Wimbledon [last year], so it couldn't go on.

"Currently I'm in three parts. First, the whole rehab, getting back on your feet at the beginning. Then afterwards, learning to walk and building up the whole thing.

"It's only now where I'm at the phase where I can start thinking about my comeback. I had a very good MRI a few weeks ago, which makes me feel very positive."

Federer's tally of 20 career Grand Slam titles was surpassed by Rafael Nadal in January's Australian Open, and the duo are set, fitness permitting, to team up to represent Europe in the Laver Cup, which takes place in September.

The timeline for Federer's recovery also means that he will miss the second slam of 2022, May's French Open at Rolland Garros.

Rafael Nadal would "welcome" seeing Novak Djokovic play at future grand slam tournaments if he is granted permission to do so unvaccinated against COVID-19.

World number one Djokovic has courted controversy for his views on being jabbed and was last month deported from Australia on the eve of the Australian Open.

Djokovic has confirmed he is willing to miss future slams after stating he was prioritising his right to choose what to put into his body above his sporting ambitions.

In Djokovic's absence, Nadal became Australian Open champion and now has 21 titles – the most for a male player.

Nadal believes that any further omissions from Djokovic would only be harmful to the Serbian's chances of history not the slams themselves, but he would have no issue with his rival playing in the sport's biggest tournaments.

Speaking ahead of his return to the ATP Tour in Acapulco, Nadal said: "It will affect Novak's [grand slam] history if he can't play.

"It will affect him, not the grand slams themselves. Whoever wins the most slams – it will be what it will be. Everyone takes their own decisions and must live with them.

"In that sense, hopefully the pandemic subsides and we stop having so many deaths around the world and this horror ends, and we can return to normality – not for Novak but for the world in general.

"There are many people that have suffered, but if Novak can play the grand slams unvaccinated, then he is welcome."

Nadal defeated Daniil Medvedev in an epic Melbourne showpiece to become the first man to 21 slams, but he says the achievement has not changed his life.

"Absolutely nothing has changed having 21 slams, I won't lie to you," he added.

"From 20 to 21 there is not a very large difference. Life goes on exactly the same. The only thing that has changed is that now I play tennis, which a few months ago I couldn't.

"I am very happy for everything that happened in Australia, it was very unexpected, especially before the tournament started. In my life, nothing has changed. No title is going to change what is important in my life, which are other things.

"Already, at 35 years old, I have a lot of experiences behind me, of successes and bad moments and these sensations already help me to live in a more calm and different way."

Novak Djokovic has said missing grand slams including the French Open and Wimbledon will be "the price I am willing to pay" for resisting the COVID-19 vaccine.

Last month, the world number one and 20-time grand slam winner was deported from Australia on the eve of the Australian Open after his entry visa to the country was cancelled.

That stemmed from Djokovic refusing to join the overwhelming majority of fellow tennis stars in being vaccinated against coronavirus, and amid controversy over how he handled getting the virus himself in December.

In a new interview with the BBC, Djokovic said he was prioritising his right to choose what to put into his body above his sporting ambitions.

The 34-year-old Serbian declared his stance is likely to keep him sidelined for "most of the tournaments" at present.

Djokovic is set to make his return to the court at the Dubai Duty Free Tennis Championships later this month, with vaccination not a requirement. He has been included on the entry list for next month's Indian Wells Open, but that is a tournament he may have to sit out.

He confirmed in the BBC interview that he has still yet to be vaccinated, though did not entirely rule out the prospect in the future.

"I have not," he said. "I understand and support fully the freedom to choose whether you want to get vaccinated or not."

Prior to entering Australia, where he was obliged to confirm his status, it was only widely assumed that Djokovic had not been inoculated.

Now he is keen to "speak up ... and justify certain things", adding: "So I was never against vaccination. I understand that globally everyone is trying to put a big effort into handling this virus and seeing hopefully an end soon to this virus.

"And vaccinations are probably the biggest effort that was made on behalf of the planet. I fully respect that, but I've always represented and always supported the freedom to choose what you put into your body. For me that is essential. It's really the principle of understanding what is right and what is wrong for you.

"And me, as an elite professional athlete, I've always carefully reviewed and assessed everything that comes in, from the supplements, food, the water that I drink or sports drinks. Anything really that comes into my body as a fuel.

"Based on all the information that I got, I decided not to take the vaccine as of today. I keep my mind open because we are all trying to find collectively a best possible solution to end COVID. Nobody really wants to be in this kind of situation that we've been in collectively for two years."

Djokovic is the reigning French Open and Wimbledon champion and, after Rafael Nadal's Australian Open triumph, he has been bumped down to joint second on the all-time men's grand slam list. Missing majors at this stage of his career could be a crushing blow to Djokovic's hopes of finishing top of that pile.

"I'm part of a very global sport that is played every single week in a different location, so I understand the consequences of my decision, and one of the consequences of my decision was not going to Australia, and I was prepared not to go," Djokovic said.

"I understand that not being vaccinated today I am unable to travel to most of the tournaments at the moment. That is the price I am willing to pay."

He looked to disassociate himself from the anti-vax community by saying he had "never said I am part of that movement" and declaring that was a "wrong conclusion" to draw.

At the same time, Djokovic concurred when asked if he was willing to sacrifice the chance to be seen as the greatest player of all time, and to travel to Roland Garros and the All England Club this year.

"Because the principles of decision-making on my body are more important than any title or anything else. I'm trying to be in tune with my body as much as I possibly can," Djokovic said.

"I say that everyone has a right to choose to act or say whatever they feel is appropriate for them."

Andy Murray has decided to skip the entire clay court season, including the French Open, as he feels the surface aggravated "issues" in the past.

Former world number one Murray has endured a torrid time with injuries in the past few years, but he has featured more regularly since the second half of last season.

While he only made it as far as the second round at last month's Australian Open, his preparation for the year's opening grand slam saw him reach a first final on the ATP Tour since October 2019.

He lost to Aslan Karatsev in the decider of the Sydney Classic, going down 6-3 6-3, but the Scot's run to the final provided evidence he still has plenty to offer.

Murray will not be playing in the next grand slam, though.

The eyes of the tennis world will be on Roland Garros in late May and early June, but Murray is opting to miss that and every other event on clay for fear of worsening his condition, with Wimbledon scheduled to begin on June 27.

"Right now, I am not planning on playing through the clay," the three-time grand slam winner said.

"The past couple of years, the clay has made issues worse; last year I had some issues at the beginning of the year, the clay didn't help, so I've spoken to my team about that and this year while I feel good and healthy, I don't want to take that risk.

"It's not that I wouldn't potentially play on clay in the future. Last year I almost missed Wimbledon, was close to not playing the grass season. I'm not planning on playing the clay. I will still try to compete a bit during that period, I won't do nothing, that's my plan just now.

"I had a busy end of last year and the next couple of months I won't take any risks and hopefully get a good build up to the grass season."

Murray parted ways with long-term coach Jamie Delgado in December and then decided against making Jan de Witt a permanent member of his team following a trial period leading up to and through the Australian Open.

The 34-year-old is now once again working with Dani Vallverdu, Stan Wawrinka's coach, having teamed up with him between 2010 and 2014.

But Murray accepts the situation is far from ideal, with Vallverdu only available while Wawrinka continues his rehabilitation from a foot injury that has kept him out since March last year.

"It's not been easy to find someone," Murray added.

"Obviously, Stan Wawrinka has been rehabbing for quite a long time and is hopefully coming back to the tour, but he agreed for Dani to come and work with me for a few weeks over the next month or so, which is great for me in the short term, but still trying to find a longer-term solution.

"It's not that straightforward, I'm not as in demand as a few years ago. Ultimately, I want it to be the right person. I'm aware there's no perfect setup, but medium, longer term I want some stability and will try and get that in the next few weeks."

Roger Federer still has the drive to return to the ATP Tour but is yet to run and is still months away in his recovery from a third knee operation.

The 40-year-old 20-time grand slam winner missed last month's Australian Open after a knee operation in August.

Federer has not played since a quarter-final loss to Hubert Hurkacz at Wimbledon last year and previously said he would be "incredibly surprised" if he was fit to play at the event in 2022.

"It's a very important next few months ahead of me," Federer said at a sponsor's event on Wednesday. "I'll know a whole lot more in April what my body is going to be like.

"Up until now I was not able to run yet and do the heavy workload. I hope that starts in the next couple of weeks and then we'll see how my body reacts.

"For now, the drive is there. I'm really motivated to do my work and what I'm allowed to do. I'd love to do way more, but the doctors are holding me back a bit."

The eight-time Wimbledon champion elaborated on his recovery, revealing he hopes to put weight on his knee again in the coming weeks.

"I can still not run. But I'm working daily in the gym," Federer said. "I really hope that I can put weight on my knee again in two to three weeks. Then we'll see how the body reacts so we can hit the ball again in April or May."

He added: "Of course I wish that everything could go quicker. But the doctors don't want me to overdo everything."

Spanish tennis great Manolo Santana, a four-time grand slam winner, has died at the age of 83.

Santana won the US Open, Wimbledon and the French Open twice during the 1960s, during which time he spent a period as world number one.

He also won the men's singles tennis tournament at the 1968 Olympics, though it was not recognised as a medal event at the time, while also winning the French Open men's doubles in 1963 and the Davis Cup with Spain on three occasions.

Santana retired in 1977 and in more recent times was regularly seen watching countryman Nadal – the only Spaniard to have won more grand slam titles – from the stands.

Nadal led the tributes to Santana on Saturday with an emotional post on social media.

"I have just received the terrible news of the death of our great Manolo Santana," he wrote on his official Instagram account.

"As I have said many times in the past: thank you very much for what you did for our country and for leading the way for so many. 

"You have always been a reference, a friend and a person close to everyone.

"We will miss you Manolo; you will always be unique and special. Greetings to your family and a lot of strength at this time. We will never forget you."

Ash Barty has announced her engagement to Liverpool fan and golfer Garry Kissick, capping a memorable year in style.

Barty added another sparkler to her collection when she revealed an engagement ring on Tuesday, having already landed the glistening Wimbledon trophy and an Olympic medal in the 2021 season.

She posted a picture of herself and Kissick on Instagram, showing off her ring and captioning the shot "Future Husband".

Kissick is a trainee professional at Brookwater Golf Club, a venue close to Brisbane, and is often seen in a Liverpool Football Club shirt, as was the case with the engagement picture.

He and Barty have visited Liverpool's home ground of Anfield together.

Speaking about having the likes of Kissick and coach Craig Tyzzer with her on the road, Barty said during her run to the Wimbledon title in July: "It's nice to be able to share some of these awesome moments with those that put so much time and energy into my career and allow me, encourage me, help me kind of work and figure out a plan and a way that they try and achieve our dreams. I think being able to share that with them is really special."

Barty won a bronze in mixed doubles at Tokyo 2020 alongside long-time friend John Peers, describing that achievement as "a dream come true".

She also won the Yarra Valley Classic, the Stuttgart Open, and WTA 1000 titles at Miami and Cincinnati before calling time on her season after a third-round exit from the US Open, where she lost to Shelby Rogers.

Barty finished the season as world number one for a third successive year, despite her recent inactivity.

She said a major triumph in her homeland was a priority for 2022, saying: "My focus is now on the Australian summer and doing everything I can to win the Australian Open. I can't wait to play at home again."

Roger Federer has confirmed he will not participate at the Australian Open and said he would be "extremely surprised" if he is fit enough to play at Wimbledon.

The 20-time grand slam winner has played just 13 matches in 2021 as he recovers from a third knee surgery in the space of 18 months, with Federer's last appearance a disappointing straight-sets loss to Hubert Hurkacz in the quarter-finals at SW19 in July.

The Swiss great has now officially confirmed he will not be at Melbourne Park for the first grand slam of 2022, while it remains touch-and-go whether Federer will be back at Wimbledon this year.

"At the moment, I expect to be able to return in the summer of 2022," he told Tribune de Geneve having confirmed playing in Australia is out of the question. 

"The next four or five months are crucial. In the spring, I will already see things much more clearly. The truth is that I would be incredibly surprised if I were to play again at Wimbledon [in 2022]."

"When you get right down to it, it doesn't make much difference whether I return in 2022 or not until 2023, at 40 or 41. It doesn't matter. The question is rather will I manage to torture myself again day after day for my comeback?

"My heart says 'yes' today. So, I'm taking things step by step. I have experienced similar challenges many times in my career sometimes without the public being aware of it. Even though I know that the end is near, I want to try to play some big matches again. It won't be easy but I will try."

Now aged 40, Federer's latest injury setback led to suggestions he could call time on his glittering career, though his coach Ivan Ljubicic this week said he was not contemplating such a decision.

Federer accepts he may never play in a grand slam final again and is at peace with that fact, but still "believes in these miracles" as he aims to once again compete among the elite level.

"If I do my rehabilitation intensively, there is a chance that I will get back to a high level," he added. 

"If I do strength training, go on the bike, swim, do balance exercises, work on my upper body, then I believe in it.

"Will I return to the Tour for a smaller round or for something bigger? Nobody knows, neither the doctors nor me. But I'm fighting for it. To be clear, my world will not collapse if I never play another grand slam final.

"But it is my ultimate dream to return once again. And in fact, I still believe in it. I believe in these kinds of miracles. I have already experienced them. 

"Sports history sometimes writes such miracles. I am realistic – it would be a great miracle but there are miracles in sport."

Roger Federer's body has been saying no for the past two years, but Pat Cash is hopeful the 39-year-old will return for another run on the ATP Tour.

After suffering a setback to his longstanding knee injury during Wimbledon, the 20-time grand slam champion has this week withdrawn from the Tokyo Olympics.

Despite being without much match practice – playing just four tournaments before Wimbledon after coming back from two knee surgeries - Federer was able to make the quarter-finals at All England Club.

However, he suffered a demoralising loss to Hubert Hurkacz in straight sets in the last eight that promoted a fresh round of speculation over his future in the game.

Cash, who won Wimbledon in 1987, hopes Federer will be back despite his recent injury woe.

He told Stats Perform: "First of all, let's hope that Roger Federer will keep going. 

"I think he can, I think he just needs more matches and probably needs to make sure that he's able to last. 

"But your body starts saying no at some stage and it's been saying that for a couple of years now for him." 

Wimbledon winner Novak Djokovic is now level with Rafael Nadal and Federer on 20 slams.

Cash believes judging the Swiss star purely on grand slam titles is not a fair measure of his brilliance, pointing instead to his astonishing record totals of 58 major quarter-final berths and 46 semis.

"He has been the most consistent player that I think we've ever seen," Cash said. "He may not end up with as many grand slams but his consistency is just outrageous.

"All the other players have lost early in grand slams, the Djokovics, the [Andy] Murrays, then the Nadals had lost early in grand slams, Roger just doesn't do it.

"Of all the titles that he's won, I think for me, his most impressive record is how many semi-finals or quarter-finals in grand slams in a row that he got to. It was something ridiculous for 10 or 11 years.

"He never failed at any grand slams and that is just absolutely mind blowing."

However long he tries to play on, Cash insists nothing can sour the memories of an extraordinary career from Federer.

Cash added: "Obviously, he raised the bar as far as the standard of tennis has gone. 

"The other players really had to catch up. Novak admitted it, he said, 'Without Roger there, leading the way, I wouldn't have been as good a player as I could have been'. 

"That's the gold standard of Roger Federer over his career and I'm not sure anybody will be as consistent as him in tennis history. 

"He's just phenomenal the way he plays, and we all of course enjoy the style, his movement. And he's a class act off the court as well."

Federer's status for the US Open, which begins on August 30, is unclear, with Djokovic looking to take the outright lead for major titles and achieve a historic calendar year Grand Slam.

Novak Djokovic will never have a better opportunity to achieve a historic calendar Grand Slam, which former Wimbledon champion Pat Cash says he should prioritise at all costs.

The Serbian won a sixth Wimbledon crown on Sunday, defeating Matteo Berrettini in four sets to achieve a final victory that moved him on to 20 grand slam titles.

With Australian Open and French Open successes also already achieved, glory at the US Open would see Djokovic become only the second men's player in Open Era history to win all four majors in the same year.

Cash thinks the stars have aligned for Djokovic, with issues for his main rivals leaving the 34-year-old primed to achieve the famous feat in 2021.

"The impossible dream really is there," Cash said to Stats Perform.

"For Novak this year it is a great opportunity for him to grab a bunch of grand slams and grab all the titles. 

"Certainly Wimbledon – without disrespecting the other players – was one of the weaker men's side draws that I've seen in many, many years. 

"And that's because we've got two of the big stars coming back from injuries – Andy Murray and Roger Federer – who played well but weren't at the peak of their career.

"The younger players are coming through but they're not quite there yet and Novak is just sitting on top of that mountain as the King of the Castle.

"His performance was exceptional at Wimbledon, there's no doubts about it. 

"The slightly younger players are coming through – Berrettini obviously in the final really pushed him to just about the limit.

"Stefanos Tsitsipas in the French Open final up two sets to love. So, these guys are close, very close, and it won't be long before they catch up with Novak and the others. 

"Obviously Rafa [Nadal] was out of this Wimbledon as well – I don't really think he's a serious threat on the grass anymore but he's still a great competitor. 

"So these guys are catching up, Rafa is still there, maybe Murray will come back and Federer will come back and be in better shape in the next year – but this is the year that Novak can really grab." 

Djokovic admitted this week he is still "50/50" over whether he will take part in the upcoming Tokyo Olympics due to coronavirus countermeasures in the Japanese capital. 

Federer withdrew from the tournament on Tuesday and Cash insists Tokyo will not be the priority over glory in New York for Djokovic.

Cash added: "It's the Olympics, okay – maybe he wants to do that, but certainly his goal is now to try and win all four grand slams in the calendar year.

"He has done four in a row, but he hasn't done them in the same year, which is very, very tough to do. 

"There is a reason why I think one person has done it in [men's] professional tennis – Rod Laver and it was in 1969, so it's not easy to do. 

"But I really do think it's in his sights and that has got to be his priority. 

"It's absolutely the absolute peak of our sport to win all four grand slams in one year." 

With Djokovic now level with Federer and Nadal on 20 majors, Cash would not be surprised to see him build a big lead.

He added: "Look, it's very hard to say. We have all been proven wrong by the numbers. 

"Though most of us thought that Rafa and Novak would get pretty close to Federer, we didn't really think they'd get there and beyond. 

"I think Novak is likely to win another couple, but you know, it takes us one little injury [to derail him] so it is very hard to say.

"John McEnroe said 25 or so [for Djokovic] and that could be well within his reach at the moment. 

"He's improving and that's frightening to think. He's won 19 grand slams before Wimbledon, and all of a sudden we've seen this guy come to the net, volley, add another string to his bow to become a better player. 

"Yeah, age 34 and he is improving – that's pretty frightening." 

Roger Federer has withdrawn from the Tokyo Olympics because of a setback to his knee suffered during the grass-court season.

Olympic gold in singles is one of the few honours missing from Federer's glittering resume, the 20-time grand slam champion having won silver in 2012, losing the gold medal match to Andy Murray less than a month after beating the Briton in the Wimbledon final.

While Murray will be in Tokyo to attempt to defend his title again having successfully retained it in 2016, Federer – a doubles gold medallist in 2008 – has elected not to make the trip to Japan.

"During the grass-court season, I unfortunately suffered a setback with my knee, and have accepted that I must withdraw from the Tokyo Olympic Games," Federer wrote in a statement on Twitter.

"I am greatly disappointed, as it has been an honour and highlight of my career each time I have represented Switzerland.

"I have already begun rehabilitation in the hopes of returning to the tour later this summer. I wish the entire Swiss team best of luck and I will be rooting hard from afar. As always, Hopp Schwiz!"

Federer missed most of the 2020 season due to persistent right knee problems that led him to undergo two surgeries.

The length of his recovery forced Federer to miss this year's Australian Open but he made his return to the tour in time for the French Open, reaching the fourth round before withdrawing to focus on the grass-court season.

Yet he was stunned by Felix Auger-Aliassime in the second round in Halle and was often unconvincing in progressing to the quarter-finals at Wimbledon, where his quest for a ninth title was ended by Hubert Hurkacz, the Pole becoming the first player to win a set 6-0 against Federer at the All England Club.

The 39-year-old's withdrawal makes him the latest tennis big name to pull out of the Tokyo Games. On the men's side, Rafael Nadal and Dominic Thiem decided against competing, while Serena Williams confirmed before her first-round retirement at Wimbledon that she had no plans to play at the Olympics.

World number one Novak Djokovic has said he is "50-50" on going for his first Olympic title. Having won all three majors so far this year, Djokovic is in prime position to become the first man to do the 'Golden Slam' in the same season. Steffi Graf achieved the feat in 1988, with a sweep of the majors followed by her victory at the Seoul Olympics.

Novak Djokovic has admitted he is still "50/50" over whether he will take part in the upcoming Tokyo Olympics due to coronavirus countermeasures put in place in the Japanese capital.

The world number one made history on Sunday by beating Matteo Berrettini in the Wimbledon final to match Roger Federer and Rafael Nadal on 20 grand slam titles.

Djokovic has won all three majors in 2021 and recently suggested he would represent Serbia at this year's Olympics, with the tennis tournament due to begin on July 24.

However, with organisers this week confirming spectators will be banned from attending events in Tokyo amid rising coronavirus cases, Djokovic is unsure if he will travel to Japan.

"My plan was always to go to Olympic Games, but right now I'm a little bit divided," he said after his sixth Wimbledon triumph. 

"I also hear that there's going to be a lot of restrictions within the [Athletes'] Village. Possibly you would not be able to see other athletes perform live. 

"I can't even have my stringer that is very important part of my team. I can't have a stringer. I'm limited with the amount of people I can take in my team as well.

"It's kind of 50-50 because of what I heard in the last couple days."

Djokovic has competed at the Games on three previous occasions, but unlike Nadal and Federer he has never previously claimed a gold medal, the bronze he won in 2008 being the best the 34-year-old has managed.

Nadal, Dominic Thiem, Roberto Bautista Agut, Denis Shapovalov, Nick Kyrgios, Simona Halep and Serena Williams have previously confirmed they will not play at the Olympics.

Switzerland's Federer, who won gold in the men's doubles in Beijing 13 years ago, has yet to make a decision on his participation.

A golden age deserves a Golden Slam, and who would bet against Novak Djokovic achieving that now?

This extraordinary Serbian has chased down Roger Federer and Rafael Nadal in the grand slam race, joining them on 20 majors as he became the first $150million man in tennis.

When he raced up to the players' box and butted heads out of joy with Goran Ivanisevic, his coach, Djokovic was living out another magnificent moment in a career jammed with them.

This is now three successive Wimbledon titles and six in all at the All England Club for Djokovic.

More than that though, he is the first player since Rod Laver in 1969 to win the first three grand slams of a season, and the Olympic Games and US Open are still to come.

Steffi Graf is the only player in tennis history to have won all four majors and an Olympic gold in the same year, the great German doing so in 1988. Graf could soon have company in the record books, because Djokovic looks unstoppable.

When Matteo Berrettini snatched the opening set here on a tie-break, there were omens that said it would be the Italian's day. The grand slam final newcomer had a 22-0 winning record from the times when he previously won the first set in grass-court matches.

Djokovic had other ideas.

The 34-year-old is a case study in triumphant self-improvement, forever seeking ways to bolster his chances of winning, whether it be veganism, meditation or relentless hard yakka on the training court.

He wound up many with his views on vaccinations, and triggered others, including Federer, Nadal and Andy Murray, last August by fronting a new Professional Tennis Players Association at a time when the sport's existing off-court leaders were battling to cope amid the pandemic.

And he will never be as loved on Centre Court as Federer, Nadal and Murray, those other members of the Big Four. It's something he is coming to terms with.

"He means well but sometimes he doesn't come across," said Boris Becker on the BBC.

But what Djokovic does on court remains wondrous and his achievements are reaching new heights.

In grand slam terms, it is now a three-man crowd on 20 titles. Tennis can throw up surprises, but Djokovic is a firm favourite to break away and finish alone on top of the pile.

"It means none of us will stop, that's what it means," Djokovic said, as he reflected on matching his great rivals. "They're legends of our sport and they are the two most important players that I ever faced in my career. They are the reason where I am today.

"They helped me realise what I need to do to get stronger mentally, physically and tactically."

Federer could yet decide the time has come to quit, perhaps even before the US Open comes around, while Nadal, when he returns from his mid-season hiatus, may rise to the challenge in New York.

Yet Djokovic made his intentions quite clear when asked about the prospect of sealing a clean sweep of 2021's biggest titles at Flushing Meadows.

"I could defijnitely envision that happening," he said. "I'm hoping I'm going to give it a shot. "I'm in great form, I'm obviously playing well, and playing my best tennis at grand slams is the highest priority I have at this stage of my career, so let's keep it going."

Twenty years ago, wild card Ivanisevic won this title behind some of the greatest serving ever witnessed.

Against Berrettini and throughout Wimbledon, Djokovic demonstrated how much that shot has become such a vital play for him too.

Djokovic came into this title match with the best percentage record of first-serve points won in the tournament (85 per cent). Berrettini had served the most aces, but Djokovic sat a healthy third on that list too.

Like Cristiano Ronaldo in football, Djokovic has found new ways to prolong his stay at the top of his profession, and Ivanisevic has had a big part to play in that over the past two years.

Djokovic had 209 aces from 30 matches this year before launching into his Wimbledon mission, and he has added 68 in seven matches over this fortnight.

That represents a big step-up from where he was five years ago, when in a year that saw him win the Australian and French Opens and reach the US Open final he served a modest 276 aces in 72 matches. He has gone from serving close to four aces a match to seven. And while he will never launches aces in the manner of an Ivanisevic, he is still finding ways to develop his game.

Ronaldo has become increasingly a penalty area predator rather than a player who causes chaos across the football pitch. From the 2008-09 season to the 2013-14 campaign, Ronaldo scored at least eight goals per season from outside the 18-yard box, but over the past four seasons the most he has managed has been three.

Where once many of his goals came from fast breaks out of defence, now those are collectors' items.

The greatest find a way to sustain greatness and Djokovic is similarly working on building up the weaponry that allows him to extend his career well into his mid-thirties.

He won 79 per cent of first-serve points against Berrettini, who had a success rate of 76 per cent. And although he was out-aced 16-5 on this occasion, it was Djokovic's consistency that won out.

His athleticism remains astonishing. Trailing 3-2 in the fourth set, Djokovic dashed from the baseline to the net to track down a drop shot that would have beaten most, but he clipped the ball across court for a winner that even had Berrettini smiling.

The game was not yet up, but in essence it was. How do you beat this guy?

Djokovic now owns a 20-10 win-loss record in grand slam finals. Only Federer, who has reached 31 of those matches, has played in more.

Djokovic has won seven of the past eight slam finals he has contested. He has triumphed in six of his seven Wimbledon finals – the exception being his 2013 loss to Murray.

Tokyo awaits now, and then New York.

All that prize-money, all that he has achieved already, and Djokovic remains ravenous for more.

Roger Federer is proud to play in an era of tennis which he labelled as "special" after Novak Djokovic clinched his 20th grand slam title.

Djokovic beat Matteo Berrettini 6-7 (4-7) 6-4 6-4 6-3 at Wimbledon on Sunday to seal his third major trophy of the season.

It is the world number one's sixth title at the All England Club, as he defended the crown he won in an epic final against Federer in 2019.

Djokovic is now level in the record books with Nadal and Federer, with all three of the greats on 20 grand slams each.

The Serbian will look to make that 21 at Flushing Meadows later this year, as he aims to become just the second player in the Open Era to complete a clean sweep of the men's slams in a single year, after Rod Laver in 1969.

In the post-match presentation, Djokovic hailed Nadal and Federer as inspirations, and the latter echoed that sentiment.

"Congrats Novak on your 20th major," Federer, now ranked eighth in the world, tweeted.

"I'm proud to have the opportunity to play in a special era of tennis champions. Wonderful performance, well done!"

Novak Djokovic lauded Rafael Nadal and Roger Federer as inspirations after he claimed his 20th grand slam title at Wimbledon.

Djokovic overcame Matteo Berrettini 6-7 (4-7) 6-4 6-4 6-3 on Sunday to win for the sixth time at the All England Club, matching Nadal and Federer's haul of slam titles in the process.

The world number one dropped just two sets throughout the tournament and will now head to the US Open looking to complete a calendar Grand Slam.

Asked what it meant to draw level with his two great rivals, Djokovic said: "It means none of us three will stop, that's what it means.

"I have to pay a great tribute to Rafa and Roger, they are legends of our sport, they are the two most important players I ever faced in my career. They are the reason that I'm where I am today, they've helped me realise what I need to do to get stronger mentally, physically, tactically.

"When I broke into the top 10 for the first time I lost for two, three years all of the big matches I played against these guys. Something shifted in 2010, the beginning of 2011 and the last 10 years has been an incredible journey that is not stopping here."

Djokovic, 34, will go to New York looking to overtake his rivals and create history as he looks to become only the second man to win the four majors in the same year.

"I could definitely envisage that happening. I'm hoping, I'm going to definitely give it a shot," he said.

"I'm in great form. Playing my best tennis at grand slams is my highest priority at this stage of my career. Let's keep it going."

Djokovic beat Federer in an all-time classic Wimbledon showdown in 2019, though did not quite find his best form against slam final debutant Berrettini.

"It was more than a battle, I would like to extend congratulations to Matteo," he said.

"I know it's not the best feeling losing in a final. I'm sure there's a great career ahead, I truly believe that. He's got an incredible game, very powerful - true Italian hammer! 

"Winning Wimbledon was always the biggest dream of mine as a kid, I've told this story many times but I have to repeat it to remind myself how special this is and not take it for granted. On the contrary, to enjoy and be aware that this is a huge honour and privilege.

"A seven-year-old boy in Serbia, constructing a Wimbledon trophy from materials I could find and today finding with a sixth Wimbledon [title] it's incredible, amazing."

Berrettini took a front-foot approach and struck an impressive 57 winners, but ultimately his unforced error count of 48-27 to Djokovic's tally – proved costly. Indeed, the Italian lost the match when he sent a weak backhand into the net.

"Unbelievable feelings, maybe too many to handle," Berrettini said.

"For sure he was better than me, he is a great champion. Well done Novak, once again, he is writing the history of this sport so he deserves all the credit.

"I'm really happy for my final, hopefully it's not going to be my last one here, my last one in a grand slam."