Spain's Carlos Alcaraz made light of feeling under the weather as he dispatched Russia's Andrey Rublev in impressive fashion to revive his ATP Finals hopes on Wednesday.
With world number four Ruud already assured of a semi-final berth the match was in reality a dead rubber.
18-year-old Carlos Alcaraz earned his first ATP Masters 1000 crown
Nadal stretched his record of men's singles Grand Slam titles to 22
No. 1 seed Carlos Alcaraz of Spain was pushed to three sets before finishing off Dutch wild card Botic van de Zandschulp in the first round of the ABN AMRO Open.
The frustrated 24-year-old shook hands with his opponent and the umpire before he strode off the court, effectively defaulting himself from the contest.
Twice finalist Ruud overcomes Davidovich Fokina test
Defending champions Iga Swiatek and Carlos Alcaraz powered into the second round of the French Open on Monday.
Images from the men's singles action at the US Open on Sunday.
How the winners celebrated on Day 11 of the French Open.
Alexander Zverev has agreed a settlement after the mother of his child accused him of physical abuse and a German court closed the case on Friday, the French Open semi-finalist's lawyers said
Take a look at the five top contenders for the men's singles title at the French Open:
Nadal arrived in Paris with his own doctor to get through the tournament despite the injury.
Eighth seed Machac, who won gold in mixed doubles at the Paris Olympics, became the third player from his country to win an ATP 500 title, following Tomas Berdych and Radek Stepanek.
The Indian team is staring at a heavy defeat in its Davis Cup World Group first round tie after conceding a 0-2 lead to hosts Norway following Ramkumar Ramnathan's loss to Viktor Durasovic in the second singles in Lillehammer, Norway.
Four-time Grand Slam winner Carlos Alcaraz said a tight tennis calendar makes it difficult for players to stay motivated throughout the year and increases the risk of injuries.
Nine of the world's top-10 men and nine of the top-10 women have officially entered into the U.S. Open's revamped mixed doubles event, tournament organisers said on Tuesday, with former singles champions Carlos Alcaraz and Emma Raducanu teaming up.
'With all the foot issues, just turned 36, he adds his 22nd Major'
Chasing his 23rd Grand Slam, a frustrated Novak Djokovic was seen complaining to the umpire.
Jannik Sinner will hope to block out a rocking home crowd on Sunday when he faces Taylor Fritz in the US Open final at Flushing Meadows, where the 12th seed will be bidding to become the first American man in 21 years to win a Grand Slam singles title.
Last year's runner-up and seventh seed Ruud will now advance to the semi-finals, where he could face fourth seed Alexander Zverev or 11th seed Alex de Minaur.
The stakes could not be higher in Sunday's Flushing Meadows final between Spanish teenaged phenomenon Carlos Alcaraz and Norwegian Casper Ruud, with the US Open trophy and the world number one ranking awaiting the winner.
Team Europe and Team World are tied at 2 after one day of the Laver Cup after play opened Friday in Berlin.
Alexander Zverev will be third seed for the French Open but the 28-year-old German's prospects of winning his first Grand Slam title in Paris are not looking especially bright.
World number two Carlos Alcaraz beat seventh seed Arthur Fils 6-2, 6-4 on Saturday to advance into his third Barcelona Open final, where the Spaniard will face Denmark's Holger Rune for the title.
'Let's be confident, let's be positive and let's see what's going on'
Within touching distance of Grand Slam No. 23, Novak Djokovic said he's in an ideal position to lift the record title in Paris.
Alex Michelsen hung on to defeat Tung-Lin Wu and help the United States take a 2-0 lead against Taiwan in the Davis Cup qualifier in Taipei City on Friday.
Alexander Zverev continued to rebuild his confidence on clay with a straight sets win over Spain's Roberto Bautista Agut in the Monte Carlo Masters second round.
Novak Djokovic won 12 of the last 14 games of his match against Lorenzo Musetti to crush the Italian 6-2, 6-2 and move into the quarter-finals of the Miami Open in his best performance since the Australian Open.
Four-times Grand Slam champion Alcaraz, who is gearing up to defend the French Open title later this month, fired off 24 winners in a strong performance to seal victory.
Novak Djokovic's erratic form, Rafael Nadal's fitness woes and untimely injuries to top-ranked youngsters have set up an uncertain French Open men's tournament
World No 1 Novak Djokovic was beaten by Tomas Machac in the Geneva Open semi-finals.
Coco Gauff dismantled defending champion Iga Swiatek 6-1, 6-1 on Thursday with a ruthless display to storm into her first Madrid Open final, where she will face world number one Aryna Sabalenka for the WTA 1000 title.
Here is what you need to know about the year's Australian Open:
Ruud, who did not take kindly to Kyrgios's tweet then about how he had celebrated the victory, said the hot-headed 24-year-old was "completely crazy" and had behaved like an "idiot" on the court.
Zverev cruised past home favorite Roberto Bautista Agut 6-2, 6-2, while Sabalenka triumphed over qualifier Anna Blinkova 6-3, 6-4.
Having lost both the singles on the opening day, the Yuki-Saketh pair did put up a fight before losing to the fancied Norwegian duo in an hour and 50 minutes.
With poise beyond his 19 years and enviable stamina, Carlos Alcaraz faced down the crowd and Frances Tiafoe on Friday night to collect another thrilling win and reach the US Open final.
