Samuel Umtiti was left hurt by the jeers from Barcelona fans but the out-of-favour defender is more determined than ever to be a success at Camp Nou.

The French centre-back arrived from Lyon ahead of the 2016-17 season and played in 50 LaLiga matches over his first two campaigns.

However, a series of knee injuries restricted his involvement over the next three seasons and the defender was reportedly one of several high earners Barca attempted to shift during the past transfer window as the financially stricken giants try to alleviate their spiralling debts.

The situation came to a head during the Joan Gamper Trophy pre-season game against Juventus in which Umtiti was whistled by spectators when warming up and again a target whenever he touched the ball after coming on as a second-half substitute.

Umtiti has since not played a minute of competitive action this season and his treatment by the fans left him feeling isolated.

"Yes [the whistles hurt], a lot, honestly," he said in an exclusive interview with Mundo Deportivo.

"I never thought this could happen to me in this club because I love it, I love this club. 

"I do everything, everything, to be okay. I have had hard times due to injuries but in the end I do my job and this is the most important thing for me. Work and train hard, and people don't know it.

"[I would tell those who whistle] that I'm fine. That the most important thing is the club, helping the players, you have to help everyone. Whistling is useless. I will give everything for the club, as I have tried to do from day one."

The 27-year-old has been the subject of reported interest from former club Lyon and Manchester United but he remains adamant his future remains at Camp Nou with a January exit ruled out.

"I don't see myself playing at another club, no, impossible. Right now I have it very clear [in my mind]," he added.

"I want to show that I have the level to play here. The most important thing is to get back and show everyone that Samu is okay.

"It is clear to me, the most important thing now is to play here because it is my club, I love this club. I want to succeed here, play, win with my team-mates, with the team. 

"I see myself here, I'm waiting for that moment to play. I have to continue training, working and showing that I have a place."

Despite his ostracization from the first-team picture, Umtiti insists he has no issue with head coach Ronald Koeman – whose own position has been under threat amid an indifferent start to a season that began with the exit of Blaugrana legend Lionel Messi primarily due to the club's financial difficulties.

Umtiti, though, says he has not specifically asked the Dutchman for more playing time as he feels he has to prove his worth on the training pitch.

"I can't ask for anything, because the coach makes the decisions and I have to accept them. I must train and show that I am okay," he said.

"Ask for something? I will not do it and I think it should not be done. I must prove it on the field.

"We have six centre-backs and I knew it was going to be difficult to play but I am like that, if I have something in mind and I am sure I have the level, I intend to prove it."

In terms of his injury issues, Umtiti is adamant he is fitter and stronger than ever and is itching for a chance to prove so, while saying the work he has done behind the scenes to recover has not been fully appreciated.

"Nobody knows what I have done and what I do. The workouts I do, the double sessions. I'm a worker," he said.

"Football is my life, Barcelona is my life. Since I do not speak, people think that I do nothing, that I am on the couch all day doing nothing but at home I work, I train every day.

"We can train every day but I lack the rhythm of matches. Rhythm, rhythm, that I hope it reaches me."

It's difficult to go back to back in any sport and, in the marathon that is an NBA season, that rings particularly true.

Seven franchises have achieved the feat, with the Golden State Warriors the last team to do so in 2018.

But the fact the 73-9 Warriors of 2016 proved unable to retain the title illustrates just how difficult a challenge it is to repeat and hold on to the Larry O'Brien Trophy.

The Milwaukee Bucks will attempt to become the eighth franchise to successfully defend their crown, though they will face no shortage of competition.

With the 2021-22 season beginning on Tuesday, Stats Perform looks at some of the top contenders for the title in the coming campaign.

Milwaukee Bucks

Let's start with the obvious. The Bucks are the favourites because they have the best player on the planet, with all due respect to reigning MVP Nikola Jokic and Dallas Mavericks star Luka Doncic.

Giannis Antetokounmpo was fourth in points per 75 possessions last regular season with 29.6 and dominated on the defensive glass. His defensive rebounding percentage of 28.9 was 12th in the league.

The main feather in his cap going into 2021-22 is his ability to elevate his game to another level. In leading the Bucks past the Phoenix Suns in last season's Finals, he racked up 211 points. That tied Bob Pettit for the third-most in a Finals debut behind Rick Barry (245) and Jerry West (218). Only West and Michael Jordan (both four) can better his tally of three games with 40 points or more in a single Finals.

Supported by Khris Middleton, who had five games of 30 points or more in the postseason, and an elite facilitator in Jrue Holiday, whose 10.5 assists per 48 minutes ranked fifth among players to play in at least 10 playoff games, Antetokounmpo has a deep and dynamic surrounding cast, making the Bucks excellent candidates to go all the way again.

Phoenix Suns

The Suns may not be the first name on everyone's lips when it comes to title contenders but, having led 2-0 in the Finals before succumbing to Giannis and the Bucks, they are deserving of a place on the list.

In an offseason that could have seen much change, the Suns managed to keep the band together, the headline deal being an agreement that saw Chris Paul signed to a new contract.

While Deandre Ayton and Devin Booker are both the present and the future for the Suns, their title aspirations rest largely on the ageing shoulders of Paul. 

Paul was the only Finals player to finish above Holiday in assists per 48 minutes in the postseason (minimum 10 games), averaging 12.0 across the course of the playoffs.

He set up Ayton 143 times in the regular season and reached three figures in laying on buckets for Booker (118) and Mikal Bridges (106), living up to his moniker of 'Point God'.

However, with a combined plus/minus of -37 across the four successive losses to Milwaukee, he will have to raise his game when it matters most if he and the Suns are to end their respective waits for a title.

Los Angeles Lakers

Rarely has LeBron James not had a chance to win the NBA title over the course of his illustrious career.

However, injuries limited James to just 45 games and Anthony Davis to 36 in the regular season, forcing the Lakers into a play-in game.

James performed heroics to lead the Lakers past the Warriors in that game but they were subsequently bounced out of the playoffs by the Suns.

The Lakers' response was to add to their arsenal of stars by acquiring Russell Westbrook in a trade with the Washington Wizards.

Former MVP Westbrook tied Jokic for the league lead with 45.5 points/assists/rebounds per game in 2020-21 while breaking Oscar Robertson's record for career triple-doubles.

Such numbers will not be possible playing alongside James and Davis but, if he can thrive in a more supplementary role, the Lakers should be firmly in the mix to regain their 2019-20 title.

Brooklyn Nets

There is a case to be made that, had the Nets not been hit by injuries in their Eastern Conference semi-finals series with the Bucks, they would have been the ones lifting the trophy.

However, Kyrie Irving and James Harden were limited to only four games in that seven-game series, leaving the burden primarily on Kevin Durant.

For very different reasons, there will be a lot of strain on Durant in 2021-22.

The Nets are facing up to not having Irving for most of if not all of the campaign as the issue of his vaccination status casts a cloud over the start of their season, which begins against the Bucks.

Unable to play in home games or practice with the Nets due to being unvaccinated, the franchise has said Irving will not play until the matter is resolved.

That means the Nets face being without a player who averaged 51.7 points/assists/rebounds per 48 minutes last season.

Despite his absence, the Nets cannot be discounted as contenders due to the presence of Durant (57.5) and Harden (56.9), but that duo must stay healthy and must at least maintain if not exceed their 2020-21 levels for Brooklyn to have a legitimate shot.

Golden State Warriors

Once perennial favourites, the Warriors are perhaps more of an outside bet these days. However, when you have Stephen Curry, you cannot be taken lightly as a potential contender.

The Warriors missed out on the postseason in 2020-21 following consecutive defeats to the Lakers and Memphis Grizzlies in the play-in tournament, Curry having willed Golden State to an eighth-placed finish in the Western Conference.

Curry averaged a career-high 32.0 points per game and his scoring average of 32.1 points per 75 possessions was second only to Joel Embiid (32.9).

Converting a league record 5.3 threes per game, last season was the third in which he averaged at least 5.0. He is the only player to achieve the feat even once.

And with fellow Splash Brother Klay Thompson due back at some point, having missed the past two seasons through injury, and Andre Iguodala returning to likely finish his career with Golden State, Curry should have much more help this time around.

He still has his main facilitator Draymond Green, who led the league in setting up Curry 194 times last term, while the onus will be on 2020 first-round pick James Wiseman to develop into the floor-stretching big man the Warriors drafted him to be after an injury-curtailed rookie year.

Andrew Wiggins' vaccination status is cleared up, ensuring the Warriors will have a former number one overall pick who shot a career-high 47.7 per cent from the field in the previous campaign.

Jordan Poole's 18 points in 19 minutes in preseason against the Lakers gave further rise to hopes he can emerge as a valuable piece for the Warriors, whose two rookie first-round picks Jonathan Kuminga and Moses Moody add to an intriguing blend of experience and youth that could help Golden State get back among the elite.

San Jose Sharks forward Evander Kane has been suspended for 21 games without pay by the NHL after violating the league's COVID-19 protocol.

Kane was not with the Sharks during their training camp, while he did not play in the team's season-opening 4-3 win over the Winnipeg Jets on Saturday.

The 30-year-old – who led the Sharks last season with 49 points (22 goals and 27 assists) in 56 games – is not eligible to return until November 30 against the New Jersey Devils after allegations he submitted a fake COVID-19 vaccination card to the NHL and team.

"I would like to apologise to my team-mates, the San Jose Sharks organisation, and all Sharks fans for violating the NHL COVID protocols," Kane said in a statement on Monday.

"I made a mistake, one I sincerely regret and take responsibility for. During my suspension, I will continue to participate in counselling to help me make better decisions in the future.

"When my suspension is over, I plan to return to the ice with great effort, determination, and love for the game of hockey."

San Jose left wing Kane has four seasons remaining on a seven-year contract he signed with the Sharks in 2018.

Selected with the fourth pick in the 2009 NHL Draft, Kane has tallied 506 points – 264 goals and 242 assists – in 769 regular-season games with the Atlanta Thrashers, Jets, Buffalo Sabres and Sharks, while he has managed 13 points (six goals and seven assists) in 29 Stanley Cup playoff appearances

"The NHL has advised our organisation that Evander Kane has been suspended without pay for 21 games for an established violation of, and lack of compliance with, the NHL/NHLPA COVID-19 Protocols," the Sharks said in a statement.

"While we are encouraged by Evander's commitment to moving forward, we are extremely disappointed by his disregard for the health and safety protocols put in place by the NHL and the NHLPA. We will not be commenting further on Evander's status prior to the conclusion of the NHL's mandated suspension."

Giannis Antetokounmpo said "there's nobody in this world that can slow down" Kevin Durant as reigning NBA champions the Milwaukee Bucks begin their title defence against the Brooklyn Nets on Tuesday.

All eyes will be on Antetokounmpo and Durant when the two Eastern Conference rivals go head-to-head in Milwaukee on opening night.

Milwaukee defeated Brooklyn in a seven-game Eastern Conference semi-finals series en route to their first NBA title in 50 years last term.

As Antetokounmpo and Durant prepare to clash in a battle of the former MVPs, the Bucks superstar called for a team approach in trying to nullify the Nets forward.

"We have got to do it as a team," Antetokounmpo told reporters. "There's nobody in this world that can slow down KD.

"One of the best players in the world. Can score the ball from everywhere. We've got to do it as a team. If Khris [Middleton] is going to start on him, if I'm going to start on him, we don't know.

"But no matter what the assignment is, no matter what the game plan is, what coach tells us to do, we have to also do it."

In 10 games against the Nets across the regular season and postseason, Antetokounmpo only once scored fewer than 30 points. He averaged 61.5 points/assists/rebounds per 48 minutes and had an effective field-goal percentage of 57.9.

In three of those games, Durant went over 40 points, with the two-time Finals MVP averaging 58.5 points/assists/rebounds per 48 minutes and posting an effective field-goal percentage of 55.6.

However, Durant's plus-minus across all meetings with the Bucks was minus 18 compared to plus 26 for Antetokounmpo, perhaps speaking to his lack of support in the postseason.

The Bucks will raise their 2021 title banner and receive their championship rings prior to tip-off against the star-studded Nets.

Giannis Antetokounmpo's brother Kostas won the 2020 NBA title with the Los Angeles Lakers.

"I said let me keep it very, very simple," Giannis Antetokounmpo added in reference to the ring design. "I’m not competitive, guys. I said, I want my ring to be bigger than my brother’s.

"When Kostas, my brother, showed me his ring, it was huge. It was like an airpod case. I said at least, you know, you guys don’t sell us short, give us a big ring also."

World number one Novak Djokovic is unsure if he will defend his Australian Open crown in Melbourne next year due to vaccination requirements.

The state of Victoria, where the year's opening grand slam takes place at Melbourne Park, has introduced a vaccine mandate for professional athletes and across most industries amid the coronavirus pandemic.

The 2021 Australian Open went ahead, albeit in February instead of January, and without fans for most of the tournament following a snap lockdown of Melbourne due to COVID-19.

Djokovic was among the players critical of the conditions athletes endured prior to this year's Australian Open, with strict quarantine measures introduced, though the nine-time champion cast doubt over his participation.

"Things being as they are, I still don't know if I will go to Melbourne," 20-time major winner Djokovic told Blic. "I will not reveal my status whether I have been vaccinated or not, it is a private matter and an inappropriate inquiry.

"People go too far these days in taking the liberty to ask questions and judge a person. Whatever you say 'yes, no, maybe, I am thinking about it', they will take advantage."

"Of course I want to go, Australia is my most successful grand slam tournament. I want to compete. I love this sport and I am still motivated," said Djokovic, who has not played since losing in the US Open final, having withdrew from the Indian Wells Masters.

"I am following the situation regarding the Australian Open and I understand the final decision [on COVID-related restrictions] will be made in two weeks. I believe there will be a lot of restrictions just like this year, but I doubt there will be too many changes.

"My manager, who is in contact with the Australian Tennis Federation, tells me they are trying to improve the conditions for everyone, both for those who have been vaccinated and those who have not."

Victoria state premier Daniel Andrews responded to Djokovic's comments on Tuesday, saying it was unlikely unvaccinated players would be granted a visa to travel to Australia.

"I don't think an unvaccinated tennis player is going to get a visa to come into this country and if they did get a visa they'd probably have to quarantine for a couple of weeks," Andrews told reporters.

The Boston Red Sox made more history as they crushed the Houston Astros 12-3 for a 2-1 lead in the American League Championship Series (ALCS).

Kyle Schwarber hit another grand slam for the red-hot Red Sox, who are the first MLB team to smash three slams in a playoff series on their way to a Game 3 win on Monday.

The Red Sox hit two grand slams in their Game 2 demolition of the Astros. According to Stats Perform, Boston are the first team in major league history to have three slams within the first two innings over a two-game span.

After J.D. Martinez and Rafael Devers celebrated slams against the Astros in the second game, Schwarber cleared the bases in the second inning in Boston.

Martinez and Devers each homered again, while Christian Arroyo also went deep at Fenway Park.

The Red Sox raced out to another 9-0 lead through three innings before Kyle Tucker's three-run homer got the battered Astros on the board on the road.

Eduardo Rodriguez, who gave up five hits and struck out seven, had retired the first six batters prior to Tucker's bomb.

Martinez and Devers extended the Red Sox's lead in the sixth and eighth inning as the latter became the first ever MLB player to hit for the home run cycle (solo, two-run, three-run and grand slam) over his fist four home runs of a single postseason, per Stats Perform.

The Red Sox got to Jose Urquidy, who allowed six runs and a homer on five hits – walking two – over 1.2 rough innings.

Game 4 is back at Fenway Park on Tuesday

Braves at Dodgers

World Series champions the Los Angeles Dodgers are back on home turf as they host the Atlanta Braves in Game 3 of the National League Championship Series (NLCS), trailing 2-0.

Los Angeles Lakers superstar LeBron James insisted reducing his workload will not prevent injuries as he prepares for his 19th NBA season.

James endured a frustrating 2020-21 campaign after the four-time champion and MVP missed 27 games due to injury, while averaging the fewest minutes per game (33.4) of his illustrious career.

The Lakers were also dethroned as champions, having bowed out of the playoffs in the opening round.

James and the Lakers open their season against the Golden State Warriors on Tuesday, and the 36-year-old is not prepared to protect his body from potential harm.

"I don't play the game thinking about injuries," James told reporters on Monday.

"And I also feel worse when I play low minutes."

James averaged 25.0 points, 7.7 rebounds and 7.8 assists per game last season, while his field-goal (51.3) and three-point (36.5) percentages were his best since 2017-18.

The Lakers veteran (35,367) is third on the all-time scoring list, behind Karl Malone (36,928) and Kareem Abdul-Jabbar – James still needs 3,020 points to break the record.

"It took a while," James said of his ankle injury. "I didn't do much basketball stuff for probably the first two months of the summer, which is very rare for me, because my ankle wasn't responding how I would like it to respond.

"And the best thing about the summertime was I had time. I had time to just really get ready when my ankle was ready to go. I was always training, just wasn't on the basketball court much.

"Always doing other stuff, training, pushing, seeing if I could do other stuff with my ankle, and until I got to a point where I didn't feel any sharp pains anymore, and my flexibility was back to where it was before. That's when I knew I could get back on the floor."

Marco Rose believes Erling Haaland deserves his Ballon D'Or nomination, with the Borussia Dortmund head coach insisting he would vote for the "extraordinary" star.

Haaland is among the 2021 Ballon d'Or nominees following his exploits for Bundesliga side Dortmund.

The in-demand 21-year-old forward scored 41 goals in as many appearances over 2020-21 – including 27 from 28 in the Bundesliga as he was named the league's player of the season.

Haaland – linked with the likes of Manchester City, Real Madrid, Bayern Munich, Manchester United, Liverpool, Juventus, Paris Saint-Germain and Barcelona – has 24 goals for Dortmund in just 25 games across this calendar year.

As Dortmund prepare for Tuesday's Champions League fixture against Eredivisie giants Ajax, Rose hailed the Norway international.

"When Jule [Julian Brandt] says that he was better at headers," Rose told reporters. "Then you know exactly which huge step he [Haaland] has made forward in the last months but yes, it’s for sure something where he has made a great development.

"We are a little bit biased because Erling is our player and we always support our players. What he does is extraordinary. He is nominated and deserves it... If you see his experienced competitors who have more years of experience already then it’s just beautiful to have such a young player at this level.

"I think that Erling can win great individual titles in the next [few] years when he stays healthy but the beautiful thing about him is that he cares more about the team titles. That's the most important [aspect]. But if I could take a vote [in the Ballon D'Or], I would vote for Erling."

Haaland has scored nine goals in nine away Champions League appearances so far – a goal in this game will see him become the fastest player to score 10 away goals in the competition, breaking the record of 12 games set by Mario Gomez in February 2011 and Kylian Mbappe in February 2019.

Dortmund have won their last two major European matches in the Netherlands, winning 3-1 against PSV in October 2002 and 4-1 against Ajax in November 2012, both in the Champions League. Their last defeat on Dutch soil was in the 2002 UEFA Cup final, a 3-2 defeat in Rotterdam against Feyenoord under Matthias Sammer.

Meanwhile, Dortmund have won four of their last five away Champions League matches (L1) – more than they had in their previous 15 on the road (W3 D2 L10).

The San Francisco Giants want to exercise Buster Posey's $22million club option, with the National League (NL) West champions stressing the star will be a 2022 centrepiece if he wants to be.

Posey starred for the Giants this MLB season, helping the team to a franchise-record 107 wins and their first NL West crown since 2012 before falling to rivals the Los Angeles Dodgers in the NL Division Series (NLDS).

The three-time World Series champion, who opted out of the coronavirus-shortened 2020 campaign, was among a number of Giants players to enjoy a rejuvenation this term.

Posey boasted his best SLG (.499) and OPS (.889) since the Giants were crowned world champions in 2012, while the 34-year-old's 18 home runs were his most since his 19-homer campaign six years ago.

As the dust settles on San Francisco's season, the Giants remain committed to the 2012 NL MVP and seven-time All-Star as long as he wants to continue playing.

"He is in our estimation the best catcher in baseball this year," Giants president of baseball operations Farhan Zaidi told reporters on Monday.

"Obviously want to have conversations with Buster and continue to have internal conversations about that, but having him on this team next year is a high priority."

Zaidi added: "You can talk about his value both in how he played down the stretch and how much we missed him when he went down. Really, really important part of this team.

"The qualifying offer decision we'll have to think more about and I'm sure we'll have some conversations with his representation as we did during the year. He's happy here, I think he feels really appreciated. And we appreciate him.

"He's been one of the best hitters in baseball over the last couple of years. He's a big part of this team and we'll certainly hope that those are productive dialogues."

Phoenix Suns star and former number one draft pick Deandre Ayton was among a number of players who did not sign rookie contract extensions before the deadline.

Monday was the deadline for the 2018 draft class to pen new deals with their respective teams in the NBA.

Malcolm Brogdon of the Indiana Pacers (two-year, $45million), Memphis Grizzlies star Jaren Jackson Jr. (four year, $105m), Kevin Huerter of the Atlanta Hawks (four-year, $65m), Suns guard Landry Shamet (four-year, $43m) and the Milwaukee Bucks' Grayson Allen (two-year, $20m) all extended their contracts.

However, there were some notable names missing, including Ayton – who can enter restricted free agency next year, according to ESPN and Adrian Wojnarowski.

Ayton played a key role in Phoenix's run to the NBA Finals last season, however, the Suns did not come to the table as the 23-year-old center eyed a five-year max contract.

In 2020-21, Ayton averaged 14.4 points, 10.5 rebounds and 1.4 assists per game, while he boasted a career-best 62.6 field-goal percentage and career-high 76.9 percentage from the free-throw line.

Ayton's numbers elevated in his first playoff campaign – 15.8 points and 11.8 rebounds per game, though his future in Phoenix is now uncertain.

Cleveland Cavaliers star Collin Sexton also failed to reach a contract extension agreement with the Eastern Conference strugglers.

Sexton did not land a new deal, despite career highs in points (24.3), assists (4.4), rebounds (3.1) and field-goal percentage (47.5).

The other players without contract extensions are Miles Brides of the Charlotte Hornets, the Orlando Magic's Mo Bamba, Marvin Bagley III of the Sacramento Kings and New York Knicks forward Kevin Knox.

Philadelphia 76ers head coach Doc Rivers remains unsure if Ben Simmons will feature in the team's NBA season opener against the New Orleans Pelicans on Wednesday.

Simmons demanded a trade amid criticism following last season's playoff exit to the Atlanta Hawks and was absent from Philadelphia for the first two weeks of preseason work before showing up on October 11 to begin fulfilling COVID-19 protocols that would allow him to re-join the championship-chasing franchise.

As the 76ers – who claimed the Eastern Conference top seed in 2020-21 – gear up for the new season, Rivers was again asked about Simmons' availability.

"I have no idea," Rivers told reporters after Simmons participated in practice on Monday. "Honestly, I haven't even thought about it much.

"When it comes, I'll make the decision. But I'm just going to wait and see and watch. The spirit has been so good, and so we’re just going to keep going."

"Just learning the new stuff, conditioning, timing, rhythm," Rivers said.

"We've been together for three weeks, so we've established a good rhythm. So the more he's been in, the more he does, especially when we're working on our offensive stuff earlier, because we've built from last year but we tweaked a lot of stuff. But it's easy to pick up, especially for him."

Simmons – an elite defender – and his shooting problems were laid bare during the 2021 postseason with the top-seeded 76ers, who were eliminated in the semi-finals.

Former number one draft pick Simmons had no fourth-quarter field-goal attempts in his last four games of the playoffs against the Hawks last season. He is the only NBA player in the last 20 seasons to have four consecutive postseason games with no field-goal attempts in the fourth quarter during a season in which he was an All-Star, according to Stats Perform.

Simmons averaged just 10.1 field-goal attempts in 2020-21 – a career low, which dropped to 7.9 in the playoffs. It was the same story with his scoring as it dropped to a career-worst 14.3 points per game and 11.9 in the postseason – both career lows.

Then there is Simmons and free throws. He was exposed by rival teams as they regularly sent him to the line, with the Melbourne-born guard making just 25 of 73 shots in the 2020-21 playoffs. His 34.2 free-throw percentage is the lowest ever in a single postseason.

On chemistry, Rivers added: "It'll grow. It'll come back. I'm not that concerned, right now, with it. They are interchanging, it's coming, and it just takes time.

"Chemistry is huge, and I think overall our chemistry is phenomenal right now and we want to keep it going."

Arthur Rinderknech continued his fantastic season by defeating Federico Delbonis at the European Open, while Marin Cilic battled through in the Kremlin Cup.

Rinderknech, who sits 65th in the world rankings, had not recorded a Tour-level victory before 2021 but has now triumphed 15 times after cruising past Delbonis 6-4 6-4.

The Frenchman will meet eighth seed Dusan Lajovic in the second round in Antwerp, after the Serbian downed Richard Gasquet 7-6 (7-3) 6-1 on Monday.

The other first-round clash in Belgium saw Alexei Popyrin capitulate in the third set as he succumbed to a 4-6 6-3 0-6 defeat against world number 62 Botic van de Zandschulp.

Americans Jenson Brooksby and Brandon Nakashima also booked their places in the main draw. Brooksby defeated Norbert Gombos 6-4 6-2, while Nakashima overcame Pierre-Hugues Herbert 6-2 6-4.

Meanwhile in Russia, Cilic – who has claimed the crown in Moscow twice previously – recovered from a first-set scare in his round-of-32 tie with qualifier Damir Dzumhur, eventually triumphing 6-7 (4-7) 6-1 6-1.

John Millman experienced similar difficulties, with Benjamin Bonzi claiming the first set before the Australian succeeded 6-7 (5-7) 6-4 6-3 to set up a potential second-round match against fifth seed Alexander Bublik.

Daria Kasatkina suffered a first-round defeat against Anhelina Kalinina in the Kremlin Cup, while Jaqueline Cristian stunned Tamara Zidansek at the Tenerife Open.

World number 28 Kasatkina, who has won four WTA Tour titles, fell on home soil to Kalinina as the Ukrainian triumphed 6-2 6-3 on Monday.

Ajla Tomljanovic cruised past Liudmilla Samsonova in similar fashion, claiming a 6-2 6-4 victory in Moscow to set up a last-16 clash with top seed Aryna Sabalenka, who is ranked second in the world.

Anna Kalinskaya joins Tomljanovic in the next round as she defeated Dayana Yastremska 7-6 (7-5) 6-4 on home soil and the Russian will now face French and US Open semi-finalist Maria Sakkari.

Lesia Tsurenko had no issues against China's Qinwen Zheng as she won 6-4 6-3, while American Bernarda Pera beat Aleksandra Krunic 7-6 (7-3) 6-3 to seal her second-round berth.

Meanwhile, number two seed Zidansek, who sits 33rd in the world rankings, crashed out in Tenerife as world number 108 Jaqueline Cristian succeeded 7-5 4-6 6-1.

Zhang Shuai was the sixth favourite in Spain but she lost to fellow Chinese star Wang Xinyu 6-2 6-1, with Anna Karolina Schmiedlova also defeating Kaja Juvan 4-6 6-1 6-4 and Irina-Camelia Begu overcoming Marta Kostyuk 6-4 6-4.