Roger Federer is enjoying the "whole rhythm thing" of playing at a grand slam again but admits he has no idea what he is capable of achieving at the French Open.

The Swiss looked sharp in his first-round match on Monday against Uzbekistan's Denis Istomin, posting a 6-2 6-4 6-3 win – coming through his first match at a major since the 2020 Australian Open and subsequent knee surgery.

It was partly his prowess but perhaps also the shortcomings of Istomin's performance that allowed 2009 champion Federer to put on a show on Court Philippe Chatrier, setting up a clash with a familiar foe in Marin Cilic next.

Federer and Cilic will be going head to head for an 11th time – Federer leads the series 9-1 – and for the first time since the 2018 Australian Open final, which went the way of Basle's 20-time grand slam winner in five sets.

It will be their sixth clash in a slam and at the earliest stage they have encountered each other at a major, with those past tussles also including the 2017 Wimbledon final, when an injury-hampered Cilic lost in straight sets.

Federer spoke after beating Istomin of how it is difficult to gauge what he might go on to manage at Roland Garros.

"In a way, I like this situation, that I don't know what's next, how my next match will be. I don't even know who I play, to be honest," Federer said.

"I take it round by round, match by match. I think it's going to help me, with the way I go about it. I'm very happy I won today. It gives me a chance again to test myself on Thursday, I believe. I don't know when I'm playing.

"So see how I feel tomorrow morning. Just all these things going through practice, coming to the site, seeing people, just this whole rhythm thing.

"It's nice to be back in it."

Federer is in Paris without his family due to COVID-19 restrictions and worries it will be the same story at Wimbledon.

But he added: "We signed up for it. I didn't do rehab to then sit at home again. There's a lot to look forward to."

MEDVEDEV WINS AT LAST

Daniil Medvedev's status as the second seed in Paris was the factor that made it possible for Novak Djokovic and Rafael Nadal to be drawn in the same half of the draw, which is what transpired.

There is an element of farce about Medvedev being seeded above 13-time Roland Garros champion Nadal, because the Russian has gone out in the first round in each of his previous visits to the clay-court slam.

However, on Monday, the world number two made a breakthrough, winning well in a match where he was expected to run into trouble as he earned a 6-3 6-3 7-5 victory over Kazakhstan's Alexander Bublik.

"It doesn't feel different than the Australian Open for me coming into this tournament. Now when I'm coming to these big tournaments feeling like this, I know I'm capable of doing big things," Medvedev said.

"If I lose here in Roland Garros it's probably going to be because my opponent will play really good."

NEXTGEN MAKE EARLY IMPACT

David Goffin, the Belgian 13th seed, lost 6-0 7-5 7-6 (7-3) to 19-year-old Italian Lorenzo Musetti, and it was a day when the sight of 39-year-old Federer turning on the style was balanced by the inspiring sight of the next generation showing their potential.

Musetti's fellow Italian Jannik Sinner is also 19 and is the 18th seed, showing on Monday he has the fight to come through tough battles, rallying from two sets to one down to beat experienced French player Pierre-Hugues Herbert 6-1 4-6 6-7 (4-7) 7-5 6-4.

It was the first time Sinner had won a deciding set in a best-of-five match.

Sinner, Musetti and Spain's Carlos Alcaraz could all be major factors at Roland Garros in future years.

Alcaraz, who turned 18 in early May, followed up his run through qualifying and to the second round of the Australian Open by doing the same in the French capital.

He dropped only 11 games in winning three best-of-three-set qualifiers last week and was too strong for his 24-year-old compatriot Bernabe Zapata Miralles, snatching a 6-3 2-6 6-1 7-6 (7-4) win for a first senior win at Roland Garros.

"I think the mental game is really, really important in this kind of matches," Alcaraz said. "You have to be focused and calm all the match, like three hours and 10 minutes.

"It's really important and not easy to do. In the match I trusted a lot in my physical side. I could play really, really good game during the whole match."

Iga Swiatek celebrated her 20th birthday in style on Monday, overcoming Kaja Juvan in straight sets to get her French Open title defence off to a strong start.

Swiatek clinched her maiden grand slam – and first senior career title – at Roland Garros in 2020, and the Pole was in supreme form as she confidently saw off close friend Juvan 6-0 7-5.

A champion in Rome in the lead-up to Roland Garros, Swiatek made it 20 game wins in a row – dating back to her Internazionali d'Italia semi-final against Coco Gauff – until Juvan held her own in the second game of the second set.

Swiatek saved two break points at 5-5 before wrapping up the win.

"It's never easy to play against your best friend," Swiatek said after the match. "I have some experience because I played with Kaja for a few times. I've played with my other friends on junior level.

"You just try to block this friendship for two hours, just focus on the game.

"I think I'm doing that pretty well. It's nice to have that skill. So I was just trying to treat Kaja as any other girl, as any other opponent, because in sports when we are on court you can't have thoughts that are you going to make your game softer."

ANGUISH FOR ANDREESCU 

There was no such route through for Bianca Andreescu, the sixth seed coming unstuck against world number 85 Tamara Zidansek.

Andreescu's stint at this year's French Open lasted three hours and 20 minutes, but the world number four could not find a way through and duly became the biggest women's casualty of the first round so far.

The 2019 US Open champion headed into the tournament on the back of pulling out of a quarter-final at the Internationaux de Strasbourg due to an abdominal injury and was playing in only her third tour-level match on clay. She won the opening set on a tie-break, yet it was Zidansek who prevailed 6-7 (1-7) 7-6 (7-2) 9-7 to claim her first win over a top-10 opponent.

Kiki Bertens was another seed to drop out, the number 16 going down 6-1 3-6 6-4 to Polona Hercog.

KENIN BATTLES ON

World number five Sofia Kenin saw off a tough challenger in the form of 2017 Roland Garros champion Jelena Ostapenko.

"I knew it was gonna be a tough match, she's a great player," Kenin said, after a 6-4 4-6 6-3 victory. "I knew I needed to play my best tennis in order to win."

Kenin, 22, came from a break down twice to take the opening set, and though Ostapenko hit back, American Kenin held her nerve in the decider, setting up a second-round tie with compatriot Hailey Baptiste.

"I'm a feisty kid, and I have to fight in order to win," added Kenin, who lost to Swiatek in last year's final but has struggled for results in 2021. "I've got a little bit of feistiness in me and that helps me in these types of matches."

Cristiano Ronaldo and Romelu Lukaku headlined the list of Serie A's MVP winners for the 2020-21 season.

Ronaldo finished the campaign as the leading scorer in the competition, netting 29 times across 33 appearances for Juventus to be named the most valuable forward.

Lukaku ranked second in the scorer's list with 24 goals from 36 outings, though the Belgium striker did provide 11 assists compared to Ronaldo's tally of three as he was named "the best overall" MVP.

Both forwards only netted one goal from outside the area and scored six penalties apiece, while Lukaku had a better shot conversion rate than Ronaldo – 25 per cent compared to 17.26 - as he helped Inter finish as champions.

Meanwhile, Gianluigi Donnarumma – whose future remains unclear as his contract at Milan nears an end – was selected as the top goalkeeper.

No other keeper played more games than the 22-year-old (37), while his tally of 14 clean sheets was level with Inter's Samir Handanovic for most in the league.

Cristian Romero was named as the best defender after a fine season with Atalanta, while Inter's Italy international Nicolo Barella scooped the midfield MVP honour.

Barella played 36 times for Antonio Conte's champions, scoring three goals and setting a further up seven. On average, he created 1.46 chances per 90 minutes.

There was also recognition for Dusan Vlahovic, named the best player under the age of 23 in Serie A after netting 21 league goals for Fiorentina.

Roberto Martinez is confident Kevin De Bruyne will be fit enough to join Belgium's squad for Euro 2020, despite the facial injury he sustained in the Champions League final.

De Bruyne left the field in distress during Manchester City's 1-0 defeat to Chelsea in Porto, after taking a knock to the face from Antonio Rudiger.

It was confirmed on Sunday that the 29-year-old had sustained fractures to his nose and eye socket, and that seemed to cast some doubt over his participation in Euro 2020.

De Bruyne was always scheduled to meet up with the Belgium squad later due to his exploits for City, and Martinez is hopeful his star man will have recovered in time.

However, the Belgium coach did urge a cautious approach, with De Bruyne set to be closely monitored in the coming days.

"Kevin had a different programme, he was playing in the Champions League, that meant he had to join us seven days later," Martinez told a news conference.

"At the moment that programme has changed because unfortunately in those seven days he won't be able to rest and be with the family, it's going to be a period we need to monitor and do a lot of extra tests to see what his condition is.

"When I've spoken with Kevin, it has been quite positive as well. We've been very fortunate, Kevin doesn't need surgery. If he needed surgery, I think it would have been very difficult for Kevin to be part of the Euros.

"I think we're feeling the opposite now, because of the way that he's reacted, the treatment, we're feeling confident. We'll get a clear picture over the next seven days. It's one of those situations where we wish Kevin a speedy recovery just for him, but I feel positive he will be able to join us in the near future."

Asked if De Bruyne would be fit for Belgium's first game against Russia on June 12, Martinez replied: "We don't have an answer based on any medical facts.

"We're still assessing the extent of the injury and what is needed. I feel more confident now than I did after the final, that we'd be able to work in a way that we use Kevin in a cautious way, but a healthy way and hopefully we can see him on the pitch, enjoying his football."

After their meeting with Russia, Belgium face Denmark and Finland in their other Group B fixtures. The Red Devils play Greece and Croatia in friendlies on Friday and Monday respectively.

CONMEBOL has confirmed the 2021 Copa America will go ahead as planned, with Brazil taking over hosting duties.

This year's edition of the tournament – postponed from 2020 due to the COVID-19 pandemic – had been due to be shared between Colombia and Argentina.

However, Colombia lost co-hosting status amid mounting political unrest in the country, while the event then needed to find a new location after a surge in coronavirus cases ruled out playing games in Argentina.

CONMEBOL met on Monday to determine the future of the competition, electing to move the tournament to Brazil, who were crowned champions on home soil in 2019.

A post from the governing body's official Twitter account read: "The CONMEBOL Copa America 2021 will be played in Brazil!

"Tournament start and end dates are confirmed. The venues and the fixture will be informed by CONMEBOL in the next few hours. The oldest national team tournament in the world will make the whole continent vibrate!"

The tournament will run from June 13 to July 10.

CONMEBOL has confirmed the 2021 Copa America will go ahead as planned, with Brazil taking over hosting duties.

This year's edition of the tournament – postponed from 2020 due to the COVID-19 pandemic – had been due to be shared between Colombia and Argentina.

However, Colombia lost co-hosting status amid mounting political unrest in the country, while the event then needed to find a new location after a surge in coronavirus cases ruled out playing games in Argentina.

CONMEBOL met on Monday to determine the future of the competition, electing to move the tournament to Brazil, who were crowned champions on home soil in 2019.

A post from the governing body's official Twitter account read: "The CONMEBOL Copa America 2021 will be played in Brazil!

"Tournament start and end dates are confirmed. The venues and the fixture will be informed by CONMEBOL in the next few hours. The oldest national team tournament in the world will make the whole continent vibrate!"

The tournament will run from June 13 to July 10, though further details over locations and the exact schedule are to be released in the near future.

However, the decision to move the Copa to Brazil does not come without controversy.

The nation has been one of the worst hit by the COVID-19 health crisis with nearly 460,000 deaths, according to figures from the World Health Organisation.

CONMEBOL's decision also comes in the aftermath of protesters in cities across the country calling for Jair Bolsonaro's impeachment, with Brazil's president having previously played down the severity of the virus and also questioned the importance of vaccinations.

"The best soccer in the world will bring joy and passion to millions of South Americans," CONMEBOL added in a further tweet.

"CONMEBOL thanks the president Jair Bolsonaro and his team, as well as the Brazilian Football Confederation for opening the doors of that country to what is today the safest sporting event in the world.

"South America will shine in Brazil with all its stars!"

Christian Eriksen was stunned by Antonio Conte leaving Serie A champions Inter and does not know what it means for his own future at the club.

Former Tottenham and Ajax midfielder Eriksen won over Conte to become a regular starter in the second half of the season.

He previously admitted to not understanding Conte's tactical ways, but the Dane became increasingly influential during the Scudetto-winning campaign.

Inter's success meant it was jarring to many that Conte should leave by mutual consent last week following post-season talks with club leaders. Eriksen, currently preparing for Euro 2020 with Denmark, admitted he was among those staggered by the news.

"It was a huge surprise. It is very special when you have just won a championship with the team and the squad. I read about it like everyone else did. And all of a sudden he was gone," Eriksen told TV 2 SPORT.

"I had not seen it coming at all. We knew they were going to have this conversation, but they did too after last season. It came as a real football shock, because one did not have the feeling that he wanted to leave now."

Eriksen, 29, was a popular figure at Tottenham before opting to join Inter in January 2020, with his contract in London close to its end.

He may still have Premier League admirers, and Eriksen wants to know who will replace Conte before he reaches any decision on whether Inter remains the right place for him.

Former Lazio boss Simone Inzaghi appears the front-runner for the post.

"We do not have a coach right now, so what is going to happen, I do not know either," Eriksen said.

"I have no idea if it's good or bad for me. I have not really thought about it. I really just thought that the European Championships should start now. And that's what it's about now.

"Then I have to see if we have got a coach before the European Championships are over. And then you can take it from there. Right now it's about Denmark, and then Inter will be put aside."

In a mostly deep-lying role, Eriksen was not as influential to Inter in an attacking sense as he was during his Spurs career.

During his final full Premier League season at Tottenham, the 2018-19 campaign, Eriksen averaged 0.26 goals per 90 minutes, 0.39 assists and 2.37 chances created.

He managed three goals for Inter in their title-winning effort, at 0.19 per 90 minutes, but did not make a single league assist and created an average of 1.94 chances.

Eriksen said he had Conte to thank for becoming a league champion in Italy, as Inter ended a nine-year run of Serie A triumphs by Juventus.

"We had a professional relationship," he said, looking back at his time with Conte. "I had a good relationship with him. Of course, we probably had some different ideas about how football should be played and delivered.

"But personally there was nothing to put a finger on. It was about winning and that was what we did."

Macarthur tightened their grip on a top-six spot in the A-League courtesy of a 2-1 win at lowly Western United.

The Bulls look set to secure a finals berth in their maiden campaign, with Ante Milicic's side boasting a four-point gap to seventh-placed Wellington Phoenix, who they play on Friday in their final regular-season game.

First-half goals from Markel Susaeta and Mark Milligan proved enough to get the job done on Monday, with Iker Guarrotxena netting United's consolation.

While the hosts have now lost seven on the bounce, Macarthur have suffered only one defeat in their past eight matches.

Matt Derbyshire set up both goals for the visitors, his headed knockdown handing Susaeta the chance to finish deftly past Ryan Scott in the 27th minute.

And just four minutes later the Englishman teed up Milligan to rifle home from outside the area.

Guarrotxena's powerful second-half header gave United hope but there was to be no comeback.

Ninth-placed Perth Glory are the only team that could deny Macarthur a top-six finish. They sit six points adrift of Macarthur but have a game in hand.

Mats Hummels revealed his exile from the Germany team "felt like a personal defeat" as he vowed to make up for lost time at Euro 2020.

The 70-cap defender was ousted from the national squad after the 2018 World Cup when head coach Joachim Low decided Hummels, Thomas Muller and Jerome Boateng belonged to Germany's past.

Low said the time had come for "a new beginning", but he performed a U-turn this year when asking Hummels and Muller to return to Die Mannschaft.

Now Hummels and Muller, former Bayern Munich team-mates, could have big roles to play in what will be Low's final tournament in charge.

Germany have upcoming friendlies against Denmark and Latvia before they begin their Euro 2020 quest with a titanic group-stage clash against France on June 15 in Munich.

"I want to be fully involved on the sporting side, but also as a man," Hummels said in a news conference. "I hope that I can take the role on the pitch. As a spokesman and leader, especially when things don't go well, I want to lead the way.

"In the last six months there have been phone calls and messages about what we think about it. Ultimately, it only became concrete in the last two weeks before the squad announcement. Jogi [Low] believes that I can give the team a lot for the tournament. I want to."

Speaking about his time in the international wilderness, Hummels said: "It felt like a personal defeat, it hurt. I have always been proud to play for the national team.

"It was my goal to come back. It's an honour to play for Germany. It is a nice confirmation of the work we have done over the past few years.

"It was nice [to return], I saw many familiar faces again. I was a little nervous and excited upon my arrival and felt a certain tingling sensation. I was looking forward to the day."

No defender won more aerial challenges (129) or made more interceptions (73) than Hummels achieved for Borussia Dortmund in the 2020-21 Bundesliga, and nobody scored more than his five goals among players in his position.

He was top 10 among defenders for duels won, clean sheets, tackles, blocks and headed clearances, and Low could not continue to ignore a player with such high numbers.

Hummels won the DFB-Pokal with Dortmund too, while Muller was a driving force behind Bayern's Bundesliga success.

Of all defenders who entered 150-plus duels in the Bundesliga, only Hummels (68.77) and Borussia Monchengladbach's Matthias Ginter (68.22) – another who features in Low's 26-man squad – had a success rate of above 65 per cent.

Opta defines a duel as a "50-50 contest between two players of opposing sides".

Hungary and Portugal also feature in Germany's group, a testing start to the tournament, but Hummels predicted: "If we bring our quality to the pitch, we will prevail in the group."

He also dispelled any suggestion of possible conflict as the old guard, with their leadership qualities, return to join a squad who had been attuned to their absence.

"We won't take anything away from them; we will act together," Hummels said. "It's about having a competitive spirit in training. Muller and I bring that in, but we're not the only ones."

There is the possibility of Hummels being paired with Antonio Rudiger, a Champions League winner with Chelsea, in Germany's backline.

"We have a lot of good central defenders. Toni has shown that he can be outstanding," Hummels said. "You can even use the word 'world-class' with him."

Naomi Osaka's decision to boycott mandatory media interviews at the French Open has left tennis legend Billie Jean King "torn".

Osaka revealed in the build-up to the second grand slam of the year that she would not partake in media duties, stating that "people have no regard for athletes' mental health" during news conferences.

The WTA – organisers of the women's tour – encouraged the Japanese superstar to reach out for support with her mental well-being but stressed she had a "responsibility" to her sport to honour contractual commitments.

The 23-year-old conducted an on-court interview after beating Patricia Maria Tig on Sunday but did not appear at the allotted time for her post-match media conference and was hit with a $15,000 by tournament organisers, who threatened further sanctions, including a possible suspension.

King, a 12-time grand slam singles champion, took to Twitter to outline her stance on what is proving to be a contentious issue.

"I fully admire and respect what Naomi is doing with her platform, so I am a little torn as I try to learn from both sides of the situation," wrote King, a co-founder of the WTA.

"While it's important that everyone has the right to speak their truth, I have always believed that as professional athletes we have a responsibility to make ourselves available to the media.

"In our day, without the press, nobody would have known who we are or what we thought. There is no question they helped build and grow our sport to what it is today.

"I acknowledge things are very different now with social media and everyone having an immediate ability to speak their truth.

"The media still play an important role in telling our story. There is no question that the media needs to respect certain boundaries.

"But at the end of the day it is important that we respect each other and we are in this together."

Osaka plays Ana Bogdan in round two on Wednesday.