Roger Federer hopes to replicate fellow tennis great Rafael Nadal's "incredibly inspiring" recovery from injury when he makes his own comeback from knee surgery.

Nadal suffered from a recurring foot problem last season but returned to secure a record 21st grand slam title at the Australian Open in January, moving ahead of Federer and Novak Djokovic in the men's all-time list.

Federer has been out of action since losing in the Wimbledon quarter-finals last year, where he sustained another problem with his knee and subsequently underwent a third surgery in the space of 18 months.

The Swiss is yet to put a timeframe on his full ATP Tour return, although he is scheduled to play at the Laver Cup in September before playing the Swiss Indoors Basel event in his home city in October.

Federer, who turns 41 in August, referenced Nadal as he expressed his hopes to emulate the Spaniard's 20-match winning streak that he embarked on when returning from injury this season.

"It's incredibly inspiring when someone comes back from massive health problems," Federer told Caminada Magazin.

"Rafa and I talk on the phone from time to time, we talk a lot. I knew he wasn't doing great, but when he made it I was really happy for him. The effort is immense."

As for Federer's recovery, the world number 46 detailed the struggles he has to go through just to make it onto the court.

"As with a car, you have to turn a thousand screws until the engine runs smoothly," he added. "Today, mobilisation, stretching, and a warm-up in the morning take about 45 minutes. Then we drive to the plant. There follows a warm-up on the pitch, half an hour. 

"After that I eat, stretch, strengthen my ankles with tapes, then warm up again, do gymnastics and explosive speed exercises. Before I finally play, I took care of my body for two and a half hours.

"I don't post many pictures of the strenuous training because I was always convinced that it was a matter of course. Everyone trains hard. 

"I swore to myself that by the end of my career I wouldn't be completely broken. Later I would like to go skiing with the children and play football with my colleagues. That's why I'm doing rehab now – not just for tennis. Also for life after your career."

Asked when he will make his comeback, Federer added: "I can't even think that far. I'm waiting for the doctors' okay. I'm ready to give it my all again. 

"I feel like a racehorse scratching its stall and wanting to race. In the summer I hope to be able to hit the ground running. 

"I'm looking forward to coming home in the evening after the tough day of training and being completely exhausted."

World number one Iga Swiatek is heading to Roland Garros in a laid-back mood as she looks to win her second major title.

Swiatek won her first and only grand slam when she triumphed in Paris in 2020 as a teenager.

The 20-year-old – who rose to number one in the WTA rankings when Ash Barty retired in March – has been in sparkling form in 2020.

Having reached the Australian Open semi-finals, Swiatek has gone on to win five successive titles, becoming the fourth player since the turn of the century to manage that feat.

She became the third-youngest player to win her second title in Rome when she triumphed at the Internazionali d'Italia earlier this month, while she has won five of the last nine WTA 1000 titles.

Swiatek was defeated by Maria Sakkari in last year's quarter-finals at Roland Garros, but feels she has little to prove going into the second major of the season.

"I'm more relaxed. I don't know about being nervous, because usually it comes closer to the match, so we will see," Swiatek, who has won her last 28 matches, told a media conference.

"But I'm more relaxed, because I have so many [ranking] points and I feel like my position in the WTA is already like, you know, I have worked for it.

"Already I've kind of proved to myself and to other people that I can be in the top of the game. Before I wasn't feeling that much confidence, so this year I feel much more peace.

"I'm taking the experience of the whole process, and playing seven matches in two weeks, having the routines. Also like getting to know how it is to go higher and higher in a grand slam.

"These kind of experiences help me not only for other grand slams but for many tournaments."

Emma Raducanu declared she "could be a great clay-court player" ahead of her French Open debut at Roland Garros.

US Open winner Raducanu only made her professional clay-court debut in April, managing a straight-sets victory over Storm Sanders in Stuttgart, before quarter-final elimination to world number one Iga Swiatek.

The 19-year-old Briton followed that up with a last-16 appearance in Madrid, where she was defeated by Anhelina Kalinina as she struggled with a back injury.

Raducanu, speaking at a media conference on Friday ahead of the second major of the year, suggested she has the credentials to succeed on clay courts.

"I could be a great clay-court player, like looking forward, long, medium-term, in a few years where I have definitely developed more robustness and I'm able to repeat the same shots over and over," she said.

"I think I have definitely come a long way and probably progressed faster than expected in the last few weeks and I really am enjoying the clay. I really believe that I can be good and faster than I thought it would be."

World number 12 Raducanu retired in Rome last week while trailing against Canadian Bianca Andreescu due to a recurring back issue.

However, she confirmed she will be fit to feature in Paris, where she meets a qualifier in the first round 

"I'm learning about my body, but I'm very happy to be continuing my preparations for the French Open and to be able to play this tournament and fortunately I didn't have to miss this Grand Slam," Raducanu added.

"That is definitely a really positive thing because I really look forward to these big moments and the big tournaments.

"After Rome, I definitely had to slow down, but this week I have been training and luckily being able to practise all of the shots.

"I'm looking forward to continuing that, and it feels good to be able to move freely and just like run around. It's quite fun. I have been preparing as normal the last few days."

If Raducanu can negotiate past her first-round clash, she will then take on Aliaksandra Sasnovich or Wang Xinyu before a potential last-16 meeting with Ons Jabeur, who first has to get past Poland's Magda Linette.

Ferrari driver Carlos Sainz wants a wider debate on the impact that designs of modern Formula One cars are having on driver health.

Constructors in the series have taken steps to counteract the impact of 'porpoising' (or bouncing of the car) brought about by new aerodynamic rules, including making suspensions stiffer.

The rule changes were brought in with the intention of increasing opportunities to overtake, but one of the impacts of that has been the extra 'porpoising'.

Sainz, who sits fifth in this season's driver standings, has been in Formula One since 2015 and says he can already feel the toll taken on his back and neck.

Asked prior to this weekend's Spanish Grand Prix how the issue may be particularly prominent on the street-race of Monaco at the end of this month, Sainz said: "It's more than Monaco.

"How much toll should a driver pay for his back and his health in an F1 career with this kind of car philosophy?

"I think we need to open the debate more than anything.

"I think the regulations are great. They're doing exactly what we needed for racing. But do we need to run as stiff for our necks and back as we are having to run lately?

"I've done my usual checks on my back, neck tightness, and I see this year I'm tighter everywhere.

"I don't need expert advice to know that 10 years like this it's going to be tough, and you're going to need to work a lot in mobility, flexibility."

McLaren driver Lando Norris, a former team-mate of Sainz, offered suggestions to limit 'porpoising'.

"I would have thought you'd have much worse effects from crashing a car at 50 or 60G like some of us have done," Norris said.

"There are also many ways for them to stop porpoising. Like lifting your rear ride height 20mm."

The Tampa Bay Lightning's Ross Colton admittedly could not believe his eyes when he scored the winning goal against the Florida Panthers in a 2-1 victory, to take a 2-0 lead in their playoff series.

Colton was called onto the ice with under a minute remaining in the third period and the score locked at 1-1, but abandoned caution and made his way towards the net as Nikita Kucherov retrieved the puck.

Kucherov found Colton as he approached the net with an astonishing backhand, no-look flick off the boards as the Panthers defence converged onto him, leaving Colton with the relatively simple finish to win the game.

Colton's look of near-bewilderment almost said as much but he confirmed his awe at the 28-year-old Russian's assist afterwards.

“I couldn’t believe he [Kucherov] got it on my stick,” Colton said. “I think when we went in the corner, I just said, ‘Are you kidding me?’ like 10 times because I honestly couldn’t believe he put it on my stick.

"When you’re on the ice with Kuch, you’ve got to be ready for anything. He’s got eyes in the back of his head, because I don’t even know how he could tell I was there."

The Lightning were relentless defensively against one of the NHL's best attacking teams this season, snuffing out four Panthers power plays, including one with under five minutes remaining.

While singling out Kucherov as a "special, special player", Lightning coach Jon Cooper asserted the defensive performance and ability to snatch games in clutch moments was a reflection of the team's character.

“No, I’m not surprised,” Cooper said. “I’m just surprised they waited until 3.8 seconds left to do it.”

In Thursday's other result, the St. Louis Blues evened up their series with the Colorado Avalanche, winning 4-1.

Jimmy Butler said the Boston Celtics "whipped our tail on our home floor" in their 127-102 beatdown of the Miami Heat in Game 2.

The return of Defensive Player of the Year Marcus Smart from a foot injury ignited the Celtics on the offensive end just as much as defensively, with the team hitting a red-hot 20-of-40 from three-point range.

Boston's five that played at least 30 minutes – Jayson Tatum, Jaylen Brown, Grant Williams, Al Horford and Smart – shot 17-of-29 from long-range, and combined for 23 assists, which was two more than Miami had as a team.

Speaking to post-game media, Butler said the Celtics "tried to embarrass us", but pointed out that they were always going to be facing an uphill battle against such an outlier shooting performance.

"You do have to move on, but I don't like to move on from this. It has to hurt," he said.

"They tried to embarrass us – they did embarrass us. I think we got to realise that, or use it as fuel, but realise that the game can get out of hand when you're playing against a really good team like them that can score the ball and get stops.

"They made shots that they missed last game. That's just what it is.

"It's going to be hard to beat anybody when they shoot 50 per cent from the field and 50 per cent from three. They were the more physical team overall, and they got one on the road.

"Overall, we just have to be better. We've got a tough job to do to go over there and win, but if they did it, we can do it as well."

He added: "I look at it as 'it can't get too much worse'. They whipped our tail on our home floor.

"I guess if they do it on their home floor it's supposed to happen, but I don't see us doing that again. 

"The first half has been brutal for us in both of these games, we just got to come out and play harder from the jump and be ready, because they be throwing some haymakers in the first half."

Heat coach Erik Spoelstra said he did not feel like his side played poorly – but that it felt like the Celtics wanted revenge for Game 1.

"You definitely have to credit Boston," he said. "It's not just that they came in with great urgency and physicality – they did have that, for sure – they also played well. They played really well on both ends.

"We know what they're capable of defensively – they've done this to some very good offenses. I'm sure they were not happy with us putting up 118 in Game 1, and they came out very disruptive. 

"They got us out of our normal rhythm and flow, and the shot-making on the other end was very tough to overcome.

"You get to this point – in the Conference Finals – you just have very good teams. Teams without many weaknesses, it's great competition.

"This only counts as one, and that's what the experiences players and staff in the locker room understand. We don't like it, but they played extremely well."

Boston Celtics coach Ime Udoka believes his side responded well to being "punked" by the Miami Heat, claiming a 127-102 win in Game 2 of their playoff series on Thursday.

A 39-14 third quarter in the Heat's favour effectively decided Game 1 as the Celtics collapsed on the road, but bounced back, cutting down turnovers and putting four quarters together to split the first two games in Miami.

Marcus Smart and Al Horford's returns to the line-up were critical for the Celtics as they claimed home-court advantage against the Eastern Conference's first seed, but it was a collective effort with 28 assists off 43 made field goals.

Udoka praised his side's mental toughness in responding against a side that came at them in the opening game of the series.

"I think we were upset with how that third quarter went, specifically how we got out-toughed," Udoka said post-match. "Wasn't a lot of schemes or defensive or offensive changes, they just came at us and kind of punked us in that third quarter.

"We looked the other three quarters and how well we had done in winning those quarters, and knew if we just matched their physicality, we could be better. It kind of reminded us of Milwaukee a little bit – the first game – and didn't want to get caught off-guard again.

"I think our guys have bounced back really well all year, especially the second half of the year. Haven't lost two games in a row in a while, and obviously having Marcus and Al back gave us a little boost as well."

Smart was an important figure in his return from a foot injury, filling the stats sheet and finishing with 24 points, 12 assists, nine rebounds and three steals.

Horford provided a little bit of everything meanwhile, ending the game with 10 points, three assists and rebounds as well as a steal and a block.

Udoka commended the returning duo, allowing the team to capitalise on positive aspects from the first game.

"It was great to have the vets back, obviously," he said. "A calming presence there. We didn't get off to our best start, we were a little slow to start but we fought right back into it.

"After, I guess, the first five or six minutes we held them down scoring-wise, but it was a good overall effort. I felt we didn't play as poorly as the last game showed.

"Like I said, we won three quarters and had a very bad third quarter, it was hard to overcome but we saw a lot of positives and areas we could attack."

The Boston Celtics rebounded from a disappointing Game 1 to thrash the Miami Heat 127-102 in Game 2 on Thursday.

With the win, the Celtics have tied the series at 1-1 and snatched home-court advantage, with Game 3 and Game 4 to take place in Boston.

In arguably their best half of the season, the Celtics were nearly flawless to open the game, shooting nine-of-11 from three-point range in the first quarter on the way to putting up two consecutive 35-point frames, leading 70-45 at half-time.

The Heat threatened to make things interesting in the third period as Jimmy Butler piled on 16 of his game-high 29 points but the Celtics had an answer every time, shooting 20-of-40 from three for the contest, including 17-of-29 from the five Boston players to play more than 30 minutes each.

Jayson Tatum finished with a team-high 27 points on eight-of-13 shooting with five rebounds and five assists, while Defensive Player of the Year Marcus Smart had 24 on eight-of-22 shooting with nine rebounds, 12 assists and three steals.

Jaylen Brown chipped in an efficient 24 points on nine-of-17 shooting, and Grant Williams was excellent once again for the Celtics with 19 points off the bench, shooting five-of-seven from the field, and was +37 in plus/minus over his 32 minutes. Only Payton Pritchard finished with a higher plus/minus, finishing plus +39 in his 23 minutes, scoring 10 points with two assists in Derrick White's absence.

After dominating the 2020 Eastern Conference Finals against the Celtics, averaging over 20 points per game on 60 per cent shooting, Bam Adebayo had his second straight disappointing showing. After posting 10 points and four rebounds in Game 1, he followed it up with just six points and nine rebounds. 

Adebayo is averaging 14 points and seven rebounds in the playoffs thus far, significantly down from his season averages of 19 points and 10 rebounds.

The New York Mets treated their home crowd to a thrilling extra-innings walk-off victory, beating the St. Louis Cardinals 7-6 on Thursday.

With their top-three pitchers – Jacob deGrom, Max Scherzer and Tylor Megill – all out injured, the Mets gave starter Chris Bassitt some early run-support as a Pete Alonso base hit and a Jeff McNeil fielder's choice made it 2-0 in the opening frame.

St. Louis fought back with a towering 414-foot solo home run to Juan Yepez in the second inning, and then tied it up with another solo shot from Paul Goldschmidt an inning later, before Goldschmidt made it 3-2 with a RBI double in the fifth frame.

McNiel drove in another two Mets runs in the bottom of the fifth, opening up a 5-3 lead, but Goldschmidt would again come through for the Cardinals, grounding out to drive in one in the seventh, before tying the game at 5-5 with an infield single in the ninth to force extra innings.

After future Hall-of-Famer Albert Pujols gave the Cardinals a lead, Pete Alonso closed the show for the Mets in the bottom of the 10th inning, crushing a 447-foot bomb into the left-field bleachers to win the game.

Bassitt pitched six-and-a-third innings for four earned runs and three strikeouts, helping the Mets move to the third-best record in the league at 26-14.

Santander delivers against Yankees

The Baltimore Orioles had a memorable 9-6 win against the New York Yankees thanks to a three-run Anthony Santander walk-off homer in the bottom of the ninth inning.

After a back-and-forth battle, the Yankees tied the game 6-6 at the top of the ninth inning with a D.J. LeMahieu single, but the New York bullpen could not send it to extra innings.

An error and a base hit got two Orioles on base, and with Santander just needing a single to win the game, he instead launched a shot over the left-field fence for a dramatic walk-off win.

Trevor writes his own story    

Trevor Story played his best game as a Boston Red Sox player in his side's 12-6 win against the Seattle Mariners, hitting three home runs.

Story, 29, was the Red Sox's biggest off-season acquisition, but has struggled to start the season, with only two home runs entering Thursday's game. He turned that around in a big way with a 402-foot two-run home run in the second inning, and a 403-foot two-run bomb an inning later.

After a single in the sixth inning, Story capped off his day in the eighth frame with a 358-foot three-run shot, giving him seven RBIs in the game. 

Casper Rudd set up a semi-final clash with Reilly Opelka by claiming a straight-sets win over Thanasi Kokkinakis at the Geneva Open, while Cameron Norrie made his third semi-final of 2022 at the Lyon Open.

World number eight Rudd, who claimed the title in Geneva last year with a straight-sets final win over Denis Shapovalov, overcame Kokkinakis 6-4 7-6 (7-3) on Thursday and will now face Opelka.

The American bounced back from losing the second set against Dutchman Tallon Griekspoor to claim a 6-4 3-6 6-3 win as he bids for his third title of 2022, and second seed Ruud said he was excited to pit himself against Opelka after securing his spot in the semi-finals.

"I expect it to be tough," Ruud said. "But I will do my best and see how I can do. I always enjoy playing against Reilly. He is a similar age to myself, and it will be another battle against him – hopefully it will be a good one."

Elsewhere, three-time grand slam semi-finalist Richard Gasquet followed up his shock win over Daniil Medvedev with a 6-2 6-4 victory over Kamil Majchrzak, and will face Joao Sousa for a place in the final after the Portuguese beat Ilya Ivashka 7-5 7-5.

At the Lyon Open, top seed Norrie battled to a 6-4 4-6 7-5 win over Sebastian Baez, spurning three match points before finally downing the Argentinian after a marathon two hours and 40 minutes clash.

The world number 11 will face Holger Rune in his semi-final contest after the 19-year-old came from a set down to beat Manuel Guinard 3-6 6-3 6-4.

The other semi-final in France will see fourth seed Alex de Minaur take on Alex Molcan after the Australian's quarter-final opponent Yosuke Watanuki withdrew after losing the first set 6-4, citing a back issue.

Molcan, meanwhile, downed Federico Coria 6-3 6-2 to reach the final four.