Zverev won in four sets at Roland-Garros to send Alcaraz packing and reach the French Open semi-finals for a second straight year.
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.
Images from Day 3 of the US Open, at Flushing Meadows, New York.
Spanish tennis federation released a statement to clarify that tennis players were not allowed to return to courts until May 11, and were only permitted to conduct individual training outside.
A round-up of all tennis action on Saturday.
Defending champion Novak Djokovic and Rafael Nadal will clash for the Italian Open title after the top two seeds advanced to the final of the Masters tournament on Saturday.
Nadal confirmed the rumours that he will be a father soon.
Novak Djokovic has offered financial support and any other help required to Ukrainian former world number 31 Sergiy Stakhovsky, who has enlisted in his country's reserve army amid Russia's invasion of its neighbour.
Reaction to Novak Djokovic's disqualification from the US Open for striking a line judge with a ball during his match against Pablo Carreno Busta on Sunday.
'I have the feeling that people [are] starting more and more to... respect what he has done in tennis more and more, because he continues to beat the records'.
Carlos Alcaraz crashed to a humbling 6-3 7-6(4) defeat by Hungarian qualifier Fabian Marozsan in the third round of the Italian Open.
So Djokovic will certainly not be letting his guard slip when he plays American Denis Kudla on Friday.
Australian Open chief Craig Tiley is confident Rafael Nadal will be at Melbourne Park for next month's Grand Slam despite testing positive for COVID-19, but he is still uncertain whether Novak Djokovic will be playing.
The major milestones in Djokovic's career
Novak Djokovic is bidding to win the title for the first time since 2015 and equal Roger Federer's six.
The world number one overcame a sluggish start to defeat Argentine Diego Schwartzman 7-5, 6-3 for a record 36th ATP Masters crown.
The Serbian won 6-2, 6-3, 6-3 to claim his 15th Grand Slam title.
His third straight triumph at the All England Club also earned the Serbian a 20th Grand Slam title
World number one Rafael Nadal has been drawn alongside defending champion Alexander Zverev, Association of Tennis Professionals (ATP) reported.
Immigration Minister Alex Hawke's office said he was still considering whether to use his discretionary power to cancel Novak Djokovic's visa.
A former top-ranked junior, Nick Kyrgios' talent was never in question but the 27-year-old said that he felt his "ship had sailed" when it came to having deep runs at Grand Slams.
Australian authorities scrambled on Sunday to file a legal defence of their decision to bar entry to tennis world number one Novak Djokovic over his COVID-19 vaccination status, as the Serbian superstar spent his fourth day in immigration detention.
The match marked world number two Medvedev's ninth win in a row at the ATP Finals and he improved his head-to-head record over Ruud to 3-0.
Djokovic will be nowhere near the centre court after losing his bid to overturn a second visa cancellation.
Twelfth seed Djokovic resumed two sets to one ahead after snatching a third-set tiebreak the previous night before Wimbledon's 11pm curfew left the match on a knife edge.
Next up for the 35-year-old will be another American in 39th-ranked Tommy Paul with a potential semi-final clash against top-seeded Russian Daniil Medvedev, who he defeated in the Australian Open final from a two-sets deficit.
With Sunday's win, the world number one took his Grand Slam tally to 18, just two shy of Roger Federer and Rafael Nadal's men's record of 20.
Novak Djokovic is prepared to miss the French Open and Wimbledon if COVID-19 vaccination becomes mandatory at the Grand Slams but he is not against inoculation, the world number one tennis player said.
It was only Alcaraz's third tournament on grass, but the way he marched through the draw augurs well for his prospects at Wimbledon, where he will be seeded number one.
Novak Djokovic increased his Grand Slam tally to 19 titles, and is now one adrift of the men's record held by Roger Federer and Rafael Nadal.
While Virat Kohli is the face of that trend-setting move, Basu Shanker, the strength and conditioning coach of Royal Challengers Bangalore, has been a silent catalyst.
Australian government officials have said unvaccinated players will be barred from the tournament in January, casting doubt on whether men's world number one and reigning champion Novak Djokovic will defend his title.
Novak Djokovic said on Monday that he might consider skipping the Tokyo Olympics if the two-week sporting festival takes place without spectators.
Novak Djokovic will be favourite to reach his 27th Grand Slam final when he faces Stefanos Tsitsipas in the French Open semis on Friday but what had been a smooth path through the draw has suddenly got a little rocky.
World No. 1 Novak Djokovic remained at the top of the rankings chart
Djokovic will need to win in Tokyo and then the US Open later this year to achieve the feat that has so far only been accomplished by Steffi Graf in 1988.
Novak Djokovic said he was "sad and empty" after a being disqualified from the US Open on Sunday after hitting a line judge in the throat with a ball during his fourth-round match against Spain's Pablo Carreno Busta.
Nadal has traditionally started his French Open campaigns with at least one claycourt title under his belt but this year got to the French capital empty-handed.
Tiley denies reports Djokovic will sue Tennis Australia
Novak Djokovic is chasing a record-extending eighth Australian Open title, while Dominic Thiem will bid to become the first man born in the 1990s to win a major title.