Anna Gasser believes the Kamila Valieva doping allegations should be attributed to "higher authorities", while she said she feels sorry for the teenage figure skater.

Valieva endured a controversial Winter Olympics after being allowed to compete despite a positive test for the banned substance trimetazidine coming to light.

The 15-year-old managed gold in the team event prior to the controversy and was favourite in the singles competition, but an error-strewn performance saw her finish fourth.

Valieva was visibly upset after missing out with her solo routine in Beijing, having come under scrutiny for much of the week on and off the ice.

Big Air gold medallist Gasser expressed her support for Valieva, who was able to continue her participation due to her age, while questioning those in power if the doping allegations are proved to be true.

"It hasn't affected me, but you still kind of suffer with her," Gasser told Stats Perform when asked about the situation.

"Doping in our sports is not that big of an issue because there's not really a lot to dope. But I was thinking, this girl is 15 years old. 

"She was one of the favourites and had pressure already and then there's doping accusations. From a humane perspective, I felt sorry for her. 

"Then she finished fourth as a big favourite. I think that both ice skating and figure skating are a tough sport. I think she has touched many people because you could see how hard the situation was for her. 

"Her coach's reactions were also kind of cold towards her. At 15 years old, I don't think you can actively do doping at that age. This must have been done by higher authorities if these allegations become reality."

Gasser is not the first to comment on the reaction from Valieva's coach Eteri Tutberidze, who reportedly asked her "why did you stop fighting?" in reference to an initial mistake on the teenager's opening triple axel, with International Olympic Committee (IOC) president Thomas Bach also suggesting Tutberidze's reaction was "chilling".

Valieva remains the subject of an anti-doping investigation and her entourage – including doctors, coaches and other adults surrounding her – are also being investigated.

Aside from the controversy surrounding Valieva, Gasser insisted that the competition to retain her Olympic crown was much tougher than four years ago.

"Well, I knew it would be very hard to defend this gold medal because the sport keeps on getting younger, there's a lot of pressure from the young ones," she added. 

"On the other hand, the young ones have pushed me to my limit and inspired me. I have developed because of them. And that was very beautiful because I think you can empower each other that way. 

"And I have to say that sports-wise, defending the gold medal this year was a bit harder and more challenging than the gold medal from four years ago. Back then, I had quite a gap over my competitors. This time, it was quite balanced."

Lionel Messi has expressed his enjoyment at developing a partnership with Kylian Mbappe at Paris Saint-Germain.

Messi departed Barcelona on a free transfer last August to move to the Parc des Princes, where he joined up with former Blaugrana star Neymar and France international Mbappe.

The Argentina international has managed just two goals in 15 Ligue 1 appearances for Mauricio Pochettino's side, who sit 13 points clear at the summit of the French top flight.

Despite a lean run of scoring form, Messi acknowledged how grateful he is to be playing with some of the world's best players, including talisman Mbappe.

"[Angel] di Maria and Ney[mar] I know them from before [at Barcelona and Argentina]," Messi said in an interview with PSG's media that was released on Tuesday.

"With Kylian it was the one I didn't know and little by little we get to know each other much more and within the field to try to relate better, to see how we feel comfortable with each other. 

"I was lucky to be with the best at Barcelona and today at PSG too, I'm happy and looking forward to continuing to do so."

Mbappe leads PSG's scoring charts this season, with 17 goals to his name across all competitions.

Since his debut for PSG in September 2017, only Robert Lewandowski (151), Messi (125), Ciro Immobile (118), Cristiano Ronaldo (116) and Mohamed Salah (110) have found the net on more occasions than Mbappe (103) across Europe's top-five leagues.

Meanwhile, from that same group only Lewandowski (80.55) can boast a better minutes-per-goal ratio than Mbappe's 99.99.

However, there is speculation the Frenchman may leave for Real Madrid when his contract expires at the end of the season.

But Mbappe showed no loyalties to Carlo Ancelotti's team just yet, with his impressive solo goal proving the difference in a 1-0 triumph over Madrid in the first leg of PSG's Champions League round-of-16 clash.

While Pochettino's side have to navigate a trip to the Spanish capital to secure their quarter-final berth, Messi believes PSG are equipped to win the competition.

"Winning the Champions League is difficult, it is a competition where the best are, any detail can leave you out," he added.

"So many great clubs and teams compete, we have a team to try to achieve it. We are very excited and we want to be able to do it but we have to go with peace of mind. 

"The best team does not always win and you have to be aware of all the details, the strong teams are the ones that achieve their goals."

Antonio Conte has confirmed Harry Kane will be fit to face Burnley on Wednesday despite suffering a minor knock against Manchester City on Saturday.

Kane starred at the Etihad Stadium, scoring a brace that included a 95th-minute winner in a dramatic 3-2 triumph over the Premier League leaders.

Victory in Manchester meant Spurs' last three top-flight wins have come courtesy of 90th-minute goals (1-0 v Watford, 3-2 v Leicester City, 3-2 v Man City), as Conte's side continue their top-four pursuit.

But there were suggestions that Kane's heroics came at a cost, with the forward reportedly nursing a back problem.

However, ahead of the trip to Burnley, Conte insisted his talisman will be available for selection at Turf Moor.

When asked on Tuesday if Kane was a doubt, the Spurs head coach responded: "No. He had a hit in his back, but he has to play! If he has one leg he has to play. 

"Harry knows very well the importance he has on the squad with his personality, with his experience. But he is good. 

"I am joking, I don't force a player if he is injured to play. I only say to tell you the importance of the player. He is good, he is ready."

Kane, who has won the Premier League's Golden Boot award on three occasions, has seven goals to his name after 22 top-flight appearances this season.

By his own high standards, those returns may be lower than expected, but Conte once again heaped praise on his striker, while also hailing the importance of Hugo Lloris.

"There is a sporting director in Italy that is my friend, Pantaleo Corvino, he says: 'You can make mistake about your wife but not about the striker'," Conte added.

"For me that is the best quote that I understand in football, no? You can make a mistake about your wife but not mistakes about your striker. 

"To build a team. We are talking about two good players, two important players for us [Lloris and Kane], also the players with more experience.

"I continue to say that to have a competitive team it's important also to match experienced players with young players because when you have players with experience, the young players learn a lot. 

"We are lucky because in our team we have these two players that for sure are top, top players."

Spurs are seven points behind fourth-placed Manchester United, who are in the final Champions League qualification spot, but Conte's side do boast three games in hand.

They will look to cut that gap to four at Burnley, though the former Inter head boss is expecting a difficult task.

"My point of view maybe it's the worst period to play against them because in the last period they have had fantastic results and played a good game," he added.

"They drew with Manchester United, and away at Arsenal, and they beat Brighton 3-0.

"They lost only 1-0 against Liverpool, but the game was in the balance. For sure, for us they will be a really tough team, we have to know this. 

"It's never easy to play against Burnley and they have a good manager [Sean Dyche] that is showing in these years that his managing is very, very good and maybe he could deserve something more.

"I appreciate his job and what he's doing with Burnley. Remember one month ago many people said Burnley were relegated, but I'm sure they can save this season and I think Burnley are doing a fantastic job."

Manchester United have not faced Atletico Madrid in European competition since the 1991-92 Cup Winners' Cup last 16, a tie the Spanish side won 4-1 on aggregate as Luis Aragones got the better of Alex Ferguson.

That was a meeting of two teams on the up: United were a year away from their first of 13 league titles under Ferguson, while Atleti would go on to win consecutive Copas del Rey, with a LaLiga triumph coming in 1996. Twenty years on, Atleti and United meet again in the last 16 of the Champions League, a competition neither is expected to win but one that represents the only means of salvaging their respectively rotten seasons.

It's a difficult one to call. United have become more resolute and less porous under Ralf Rangnick, losing just once over 90 minutes since Ole Gunnar Solskjaer was sacked in late November, but in their 15 games under their interim manager, they have not been tested by elite opposition. Atleti, champions last season, are 15 points off the pace set by Real Madrid in 2021-22 and, in the time Rangnick has been at Old Trafford, they have won six and lost eight of 15 matches in all competitions.

These are well-matched, dispirited teams, who occasionally thrill in attack but always unnerve in defence. Neither looks favourite to win, and neither can afford to lose.

It has, therefore, become a big-pressure situation for the goalkeepers – and that's where form starts to differ wildly.

This will be David de Gea's first competitive meeting with Atleti since he left for United in 2011. He probably didn't imagine he would win fewer league titles than his old club in the decade to follow, but that's another story.

De Gea can at least step onto the pitch at the Wanda Metropolitano on Wednesday knowing he can claim to be one of the best in the business again based on form – a claim that opposite number Jan Oblak certainly can't make.

We know United have been extremely vulnerable this season. In all competitions, they have faced 465 shots, the fifth-highest tally among teams in Europe's top five leagues; 168 of those attempts have been on target, the third-highest number a team has faced. What is particularly worrying is that 21 of their opponents' shots have come directly from United mistakes, the highest number on the continent behind Sevilla (23).

Looking at expected goals on target – a way of measuring not just the quality of a chance (xG) but the quality of the attempt itself – United's figure against stands at 51.1 in all competitions, the third-worst among Europe's top five leagues. And yet, they have conceded 44 goals – far more than pretenders to trophies should be letting in, but around seven fewer than the numbers suggest they should. Much of that is down to De Gea.

In the Premier League alone, De Gea has made 96 saves from 128 shots on target faced, giving him a save percentage of 73.44. No other keeper has made as many stops and only Leeds United's Illan Meslier has faced more attempts, yet Meslier has conceded 50 goals to De Gea's 34. Using that same xGOT model and subtracting goals conceded (excluding own goals), we can work out a value for how many goals a keeper has prevented through saves. For De Gea, that figure is 7.1, the best in the league.

If you include all competitions, De Gea has faced the most shots on target (157) among top-five-league teams apart from Leicester City's Kasper Schmeichel (158), again showing just how fragile United can be without the ball. Looking at that 'goals prevented' metric again, De Gea is at 7.86 – in other words, he's prevented roughly eight goals through the quality of his shot-stopping. Across the continent, only two keepers to play at least 15 times this season can do better.

Preventing goals and high save percentages have traditionally been where Oblak thrives. Since his Atleti debut in September 2014, he has the most clean sheets (167) in Europe's top five leagues and a save percentage of 76.5, the third-highest. According to the data, Oblak has prevented just over 51 goals in that time, at least four more than any other keeper and nearly 20 more than De Gea. It makes his form this season all the more troubling.

Oblak has faced 50 fewer shots on target this season than De Gea – implying Atleti's defence is still stronger than United's, even accounting for their dip in standards – yet he has conceded five goals more than the Spain international. Oblak has saved 61, or 57 per cent, of the shots he has faced this season, which is an alarming drop from his career average of 76.52 per cent in Atleti colours.

Using that same 'goals prevented' calculation, Oblak is at -7.05, meaning he has conceded at least seven goals more than should reasonably be expected. Among Europe's top leagues, only seven keepers come off worse this season, and only four by a significant degree.

There is of course more to a keeper's value than the number of times the ball goes in his net, but these numbers give us a good indication of which ones are performing well when it comes to rudimentary shot-stopping. A 15-goal swing between De Gea and Oblak this season tells you everything you need to know about their recent standards, and why Atleti will have more cause for concern than United in this hugely important knockout tie.

Ralf Rangnick has heaped praise upon his opposite number Diego Simeone ahead of Manchester Untied's Champions League first-leg clash with Atletico Madrid. 

Rangnick, who is taking charge of just the third Champions League knockout tie of his career after reaching the semi-finals with Schalke in 2010-11, was rewarded for guiding the Red Devils to top of Group F with a trip to the Wanda Metropolitano. 

Despite winning LaLiga last season, Atletico have endured a difficult campaign domestically, and are currently fighting with a rejuvenated Barcelona for a place in Spain's top four.

Atletico have also lost each of their last four Champions League meetings with English opposition, but Rangnick was keen to emphasise Simeone's achievements in Madrid, stressing that United will have to match their hosts both mentally and physically if they are to stand a chance of progressing.

"He has won trophies with a clear identity, with a recognisable style", Rangnick said of Simeone. "I don't think this has changed in the last few years. 

"They are always an emotional side, and this reflects the character of the manager. Simeone is probably one of the best emotional managers in Europe. 

"The style and the way his teams have always performed reflects those emotions that he brings to the team. We need to match those levels of energy and emotion in both games. 

"It will be physical, it will be emotional, and we will have to be mentally strong. I will try to prepare our team for that challenge."

Rangnick has only lost one of his 15 games since taking the reins at United, but a recent FA Cup exit plus draws against Burnley and Southampton brought renewed criticism of the Red Devils' performances.

However, attacking midfielder Bruno Fernandes has defended their displays, as he aims to fire United to their 500th goal in the history of the European Cup and Champions League.

 

"I think the team has been playing well even, in the games we didn't win", Fernandes, who scored in Sunday's dramatic 4-2 win at Leeds United, said.

"Obviously when you don't get the result, it's not perfect. Winning games [makes] you feel more confident. 

"Going into this game, which is an important one, we know that having the confidence of winning games gives you something more. If we stick from the plan from the first to the last minute, we can win the game."

Fernandes has the most goal involvements (15) of any Manchester United player in the Premier League this season, and has recorded the most assists (five) of any player in the Champions League this term, but is yet to find the net in Europe himself this campaign.

Liverpool boss Jurgen Klopp has conceded injured forwards Diogo Jota and Roberto Firmino will not be fit for the Premier League clash with Leeds United, and that both face a race against time to make Sunday's EFL Cup final against Chelsea.

Jota, whose tally of 12 league goals for the season is bettered only by Mohamed Salah among Liverpool players, suffered a knock in last week's Champions League win at Inter, while Firmino reported discomfort after the same fixture.

Both forwards sat out the Reds' 3-1 Premier League win over Norwich, with fellow attackers Salah, Sadio Mane, and Luis Diaz all finding the net.

Ahead of a week in which Liverpool can close the gap to Manchester City in the Premier League to just three points, before looking to lift their first domestic cup since 2012, Klopp was not hopeful about the pair's prospects.

"For tomorrow [Wednesday, against Leeds], no chance, and then [for] the final we will see", Klopp said. "It would be easy to say 'no' now, but we will see. 

"They are [pushing], but they were not on the training pitch [yet] so that's not a good sign. 

"We have to see what we can do with the boys in the next few days, and then make a decision later in the week."

Liverpool, who have only failed to score in one of their last 23 meetings with Leeds in all competitions, netting in each of their last 16 in a row since a goalless draw in April 1999, will go within three points of City if they beat the Whites at Anfield, but Klopp was keen to highlight Leeds' strengths before the contest.

"We saw all the faces of Leeds United on Sunday [in their 4-2 defeat to Manchester United]," he added.

"They are very brave and very exciting. Offensively, they go with everything they have. Defensively, you can cause them problems, but that is difficult as well, because of their man-marking all over the pitch.

"If you are not really up for the game, they will eat you."

Edinson Cavani will miss the first leg of the Champions League last-16 tie between Manchester United and Atletico Madrid.

The striker is still being troubled by a groin problem, having missed the Red Devils' past three Premier League matches.

Interim manager Ralf Rangnick said the Uruguay international has been unable to train for two weeks and does not feel capable of running at full capacity, meaning there is little point in including him in the squad for Wednesday's match.

"No, Edi will not be able to make the trip," he told reporters on Tuesday. "He didn't train and hasn't been training for the last couple of weeks.

"He has problems with his groin and as long as he doesn't feel ready to fully sprint, it doesn't make sense to train him."

Cavani has scored two goals in 11 games in a season blighted by persistent unavailability.

Having been persuaded to stay at the club for another year by Ole Gunnar Solskjaer after impressing in 2020-21, Cavani has missed 20 of United's 35 matches in all competitions, last playing in the 1-1 draw at Burnley on February 8.

United allowed Anthony Martial to join Sevilla on loan in January but did not sign a replacement, meaning 37-year-old Cristiano Ronaldo will be their only recognised centre-forward for the game at the Wanda Metropolitano.

The Portugal star has scored 25 goals in 35 appearances against Atleti in his career, netting three hat-tricks against Diego Simeone's side, two in the Champions League.

Rangnick, whose side battled to a 4-2 league win at Leeds United on Sunday, said: "We have made sure the players could recover in the last few days and maybe we will have some fresh legs on the pitch. We will see tomorrow.

"Some of our players will not be received with the red carpet. We have some experience and some talented young players, so the balance is perfect.

"Mentally, we need to prepare for a very emotional, if not hostile, atmosphere. I don't think the game or the fixture will be decided tomorrow, it will be decided in the second leg at Old Trafford.

It remains unclear whether Aaron Rodgers has played his last snap as a Green Bay Packer or on a football field, and he is clearly happy to let the NFL universe continue to do the guessing.

The four-time MVP fuelled speculation over his future on Monday with a cryptic Instagram post thanking team-mates including Randall Cobb and David Bakhtiari, coaches and his ex-fiancee Shailene Woodley for the experiences of "the last beautiful year".

Rodgers, who won the MVP award for the second successive season in 2021, wrote: "Here's some... #MondayNightGratitude for some of the incredibly special people in my life, with some pictures from the last beautiful year.

"@shailenewoodley, thanks for letting me chase after you the first couple months after we met, and finally letting me catch up to you and be a part of your life.

"Thanks for always having my back, for the incredible kindness you show me and everyone you meet, and for showing me what unconditional love looks like, I love you and am grateful for you.

"To the men I got to share the QB room with everyday, Matt [LaFleur], Nathaniel [Hackett], Luke [Getsy], @jordan3love and @kurtbenkert, you guys made every day so much fun and I’m so thankful for the daily laughs and stress relief you brought me every week of the year. I love you guys.

"To the Friday Crew, @aiydacobb, @rcobb18, @frankieshebby, and @davidbakhtiari, I loved every moment we got to spend together this year. Your love and support was overwhelming, and I cherish the friendships I have with each of you.

"To my team-mates, past and current, you are the icing on the beautiful cake we call our job; football. The friendships that we have will transcend our collective time in this game and I am so thankful for the role that each of you have played in making my life that much better. I love you guys, and cherish the memories we've made.

"To everyone else, spread love and gratitude you beautiful people, and read a book once in a while too while you’re at it. Love and peace."

It was reported before the opening round of the 2021 NFL Draft that Rodgers wished to part with the Packers. The subsequent stand-off and Rodgers' absence from their offseason activities cast a shadow over the Packers' pre-training camp preparations for the season.

After reporting for camp, Rodgers' 2021 campaign was partly defined by controversy after a positive coronavirus test revealed previous misleading statements about his vaccination status, while his spread of misinformation regarding vaccines has unquestionably damaged his reputation.

On the field, he helped the Packers to an NFL-best 13-4 record in 2021, finishing the regular season with 37 passing touchdowns to just four interceptions, giving him the best touchdown to interception ratio in the NFL. Among quarterbacks with 200 passing attempts, only Justin Herbert (2.30) threw a lower percentage of interceptable passes than Rodgers (2.36).

No quarterback delivered more throws that resulted in a first down than Rodgers, who did so on 40.1 per cent of his attempts, while he was second in passer rating on third down (112.2) behind Kyler Murray (118.5) among quarterbacks with at least 50 attempts in that situation.

His stellar play in the regular season did not translate into the postseason, with the Packers going one and done as they suffered a 13-10 Divisional Round upset at the hands of the San Francisco 49ers.

Since Rodgers led the Packers to glory in Super Bowl XLV at the end of the 2010 season, they have reached the Divisional Round of the playoffs eight times but have never returned to the Super Bowl.

Tottenham boss Antonio Conte has taken aim at his Manchester City counterpart Pep Guardiola after Spurs' 3-2 Premier League win at the Etihad Stadium.

Conte mocked the latter's assertion that Tottenham played on the counterattack during their dramatic victory in a post on Instagram.

Harry Kane and Son Heung-min starred as Spurs grabbed a last-gasp win at the home of the Premier League champions, despite twice having squandered a one-goal lead.

Each of Tottenham's last three wins in the Premier League have now come courtesy of 90th-minute goals (1-0 v Watford, 3-2 v Leicester City, 3-2 v Man City), as Spurs kept pace with their rivals in the hunt for Champions League qualification.

After the contest, during which the visitors managed just 29 per cent of the possession and racked up six shots to City's 21, City boss Guardiola told of how the north London team had "defended in the 18-yard box" before catching the league leaders on the break.

Conte has now moved to mock those assertions on social media after dealing City their first Premier League defeat since October.

On his personal Instagram account, Conte posted a video of his team's three goals in the match, displaying the complete build-up to each, with the caption "Counterattacks?!? Maybe not…", complete with three laughing emojis.

The former Juventus, Chelsea, and Inter boss has led Tottenham to 11 wins in 20 matches since taking charge across all competitions, with their comeback win in Manchester ending a run of three successive league defeats for the top-four contenders. 

Spurs will continue their chase for European football when they face Burnley at Turf Moor on Wednesday, having only lost one of their last 12 Premier League meetings with the Clarets.

UEFA could decide to move the Champions League final from St Petersburg as European football's governing body closely watches the escalating crisis in Ukraine.

The 2022 final is scheduled to take place in Russia's second-largest city, one of the main venues during the 2018 World Cup and Euro 2020, on May 28.

UEFA's present position is to hold the Champions League final in St Petersburg, but it is understood the situation could change, even at short notice. The previous two finals were moved due to the COVID-19 pandemic.

European football's governing body said in a statement on Tuesday: "UEFA is constantly and closely monitoring the situation. At present, there are no plans to change the venue."

Staging European football's most prestigious club match in Russia has become more difficult following the decision by Vladimir Putin, the country's president, to order troops into eastern Ukraine.

Russia's military was sent into the region on "peacekeeping duties" after the decision to recognise the areas of Luhansk and Donetsk as self-proclaimed independent states loyal to Moscow.

Last season's final between Chelsea and Manchester City was relocated to Porto from Istanbul with only two weeks' notice. This was because Turkey was on the United Kingdom's 'red' list, meaning fans were urged not to travel for the game due to coronavirus risk levels.

Alexander Zverev saved a match point and battled back to salvage a dramatic victory over Jenson Brooksby at the Mexican Open in what was the latest finish in tennis history.

Second seed Zverev – the defending champion in Acapulco - wrapped up a dramatic win at 04:55 local time after his own lengthy contest had followed two other epic three-setters earlier on the schedule.

Zverev at one stage looked like he was on the way out but ultimately triumphed 3-6 7-6 (12-10) 6-2 to book a second-round tie against Peter Gojowczyk.

The German had beaten Brooksby in a match that also went to a decider when they clashed at Indian Wells in October and he was pushed to the limit again in a battle lasting 200 minutes.

Having dropped the first set, Zverev had to fend off three break points at 3-3 in the second and saved a match point at 6-5 as part of an epic tie-break that went in his favour. 

Zverev was then more comfortable as he broke twice in the decider to seal victory, his American opponent paying the price for converting just one of his seven break-point opportunities in a match that made history for its late finish.

Elsewhere, Stefan Kozlov overcame cramps in the second set to outlast Bulgarian Grigor Dimitrov 7-6 (10-8) 5-7 6-3, with that match lasting three hours and 21 minutes.

John Isner sent down 29 aces and saved a match point as he trailed 5-2 in the third set, ultimately winning 7-5 6-7 (4-7) 7-6 (7-3) over veteran Fernando Verdasco in another epic topping the three-hour mark that helped to push back the start time for Zverev and Brooksby.

Seventh seed Taylor Fritz got past Frenchman Adrian Mannarino 6-3 6-3, while Dusan Lajovic knocked off Sebastian Korda 6-4 4-6 7-5 and eighth seed Pablo Carreno Busta beat Oscar Otte in straight sets.

At the Chile Open in Santiago, eighth seed Facundo Bagnis won 6-3 6-0 over Bernabe Zapata Miralles in the round of 32.

Brazilian Thiago Monteiro got past local Nicolas Jarry 7-6 (11-9) 6-4, while qualifier Juan Ignacio Londero and wildcard Thiago Seyboth Wild also progressed.

Alexander Zverev saved two match points and battled back to salvage a dramatic victory over Jenson Brooksby at the Mexican Open in what was the latest finish in tennis history.

Second seed Zverev – the defending champion in Acapulco - wrapped up a dramatic win at 04:55 local time after his own lengthy contest had followed two other epic three-setters earlier on the schedule.

Zverev at one stage looked like he was on the way out but ultimately triumphed 3-6 7-6 (12-10) 6-2 to book a second-round tie against Peter Gojowczyk.

The German had beaten Brooksby in a match that also went to a decider when they clashed at Indian Wells in October and he was pushed to the limit again in a battle lasting 200 minutes.

Having dropped the first set, Zverev had to fend off three break points at 3-3 in the second and saved match points at 6-5 and 10-9 down as part of an epic tie-break that went in his favour. 

Zverev was then more comfortable as he broke twice in the decider to seal victory, his American opponent paying the price for converting just one of his seven break-point opportunities in a match that made history for its late finish.

The previous latest ATP finish time was Lleyton Hewitt's 2008 Australian Open clash with Marcos Baghdatis, which ended at 04:34 local time.

Elsewhere, Stefan Kozlov overcame cramps in the second set to outlast Bulgarian Grigor Dimitrov 7-6 (10-8) 5-7 6-3, with that match lasting three hours and 21 minutes.

John Isner sent down 29 aces and saved a match point as he trailed 5-2 in the third set, ultimately winning 7-5 6-7 (4-7) 7-6 (7-3) over veteran Fernando Verdasco in another epic topping the three-hour mark that helped to push back the start time for Zverev and Brooksby.

Seventh seed Taylor Fritz got past Frenchman Adrian Mannarino 6-3 6-3, while Dusan Lajovic knocked off Sebastian Korda 6-4 4-6 7-5 and eighth seed Pablo Carreno Busta beat Oscar Otte in straight sets.

At the Chile Open in Santiago, eighth seed Facundo Bagnis won 6-3 6-0 over Bernabe Zapata Miralles in the round of 32.

Brazilian Thiago Monteiro got past local Nicolas Jarry 7-6 (11-9) 6-4, while qualifier Juan Ignacio Londero and wildcard Thiago Seyboth Wild also progressed.

Novak Djokovic welcomed the "positive" reception he has received from his fellow players, after making his first appearance since missing the Australian Open.

Djokovic, whose decision not to be vaccinated against COVID-19 caused him to be deported from Australia on the eve of the year's first grand slam, eased to a 6-3 6-3 win over Lorenzo Musetti in just 74 minutes at the Dubai Tennis Championships.

Djokovic spoke publicly about his vaccination status for the first time in a BBC interview last week, while rival Andy Murray, who has spoken about his support for vaccination on numerous occasions, said that he "didn't like seeing" Djokovic's ordeal in Australia after his own win in Dubai.

Serbia's 20-time Grand Slam winner says that most of his fellow professionals have been supportive upon his return to action.

"So far here most of the players that I’ve seen – I haven’t seen too many players – but most of the players that I've seen have been positive and welcoming", he said after his round-of-32 win.

"It's nice to see, obviously. I can't say that was the case in Australia. It was a little bit strange. But here, it's gone well so far."

The 34-year-old impressed against Musetti, serving five aces, winning 71 per cent of his second serves (17 out of 24) and saving each of the seven break points he faced during his first outing of the year, and Djokovic was also pleased with the reception he received from the fans in Dubai, as well as with his performance. 

"I couldn't ask for a better reception," he added.

"It's been a while since I played, and I couldn't think of a better place to kick-start the season. Thank you for the reception and for welcoming me on court the way you did.

The Pittsburgh Steelers are intrigued to see what Mason Rudolph can do but will still be adding to the quarterback position this offseason.

After the retirement of Ben Roethlisberger, Pittsburgh have uncertainty over their regular starter at QB for the first time since the two-time Super Bowl winner was drafted in 2004.

Rudolph was backup to Roethlisberger over the past three seasons and has started 10 games over that span, while former Washington first-round pick Dwayne Haskins is expected to stay with the team.

The Steelers will also bring in another option, either via free agency, trade or the NFL Draft, but outgoing general manager Kevin Colbert was positive about Rudolph.

"Mason's 5-4-1 as an NFL starter, albeit in a backup kind of role, but we are excited to see what is next for Mason," said Colbert, who will step down as GM after the draft process, per ESPN.

"If we started a season today, Mason would be our starter, and we're excited to see where that can go. I'm comfortable that Mason has won more games than he's lost as a starter.

"Where that can go, we'll see. To be an NFL starter that you can win with, you gotta prove it over 16 games. I'm anxious to see that, if that's the case.

"And we're excited to see what Dwayne can provide either from competition, or maybe he evolves as a starter."

Jimmy Garoppolo has been linked as a possible trade candidate, while the Steelers have the number 20 pick in a draft which does not have a consensus top QB expected to go at the top of the order.

Colbert added: "We know we're going to add to the position. I can't tell you how, but at this point we will go to camp with four [QBs].

"If we had to start today with Mason as our starter, let's go. We'll try to build the best team around him."

Malik Willis, Sam Howell and Kenny Pickett are among the draft prospects Pittsburgh are likely to be doing due diligence on.

"The draft class of quarterbacks, there's good quality available – probably not as many as there have been in recent years, but it is what it is," added Colbert.

"This group, there's good players in it and there's good players that all have a different skill set. 

"That's what was really unique about watching them compete at the Senior Bowl, because the majority of them were there, and they're all different. 

"I know some of them will be starting quarterbacks, winning quarterbacks, and that's exciting."

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