Alcaraz worked on making his serve more potent in the off-season and was thrilled with how it held up against Nishioka.
Elaine Thompson clocked a sizzling wind-assisted 10.71 seconds to win the 100 metres at the Jamaica International on Saturday, sending out a warning to her sprint rivals ahead of August's Rio Olympics.
Rohan Bopanna and his Australian partner Matthew Ebden have clinched a spot in the prestigious season-ending ATP Finals, marking the Indian's fourth appearance in the tournament.
Djokovic saved three breakpoints in stifling conditions to go 5-4 up but lost the opening set in a tough tiebreak as Opelka cranked up his serve
Britain's Henry Patten and Finland's Harri Heliovaara beat Australia's Max Purcell and Jordan Thompson 6-7(7), 7-6(8), 7-6(11-9) in the men's doubles final at Wimbledon on Saturday to clinch their first Grand Slam titles.
Novak Djokovic and Nick Kyrgios enthralled fans on their debut as a doubles team on Monday
Mumbai Indians, Kolkata Knight Riders, Rajasthan Royals, Sunrisers Hyderabad and Lucknow Super Giants are among the IPL franchises who have submitted bids.
All-rounder Ewen Thompson was the only new face named in New Zealand's 13-man squad for two Twenty20 matches against the West Indies this month. Thompson, 29, has taken 16 wickets at an average of 17 and an economy rate of 6.97 playing for Central Districts.
Tiger Woods withdrew after 11 holes of his opening round at the Farmers Insurance Open.
Images from the athletics action at Stade de France, Saint-Denis, Paris, on Friday.
All the action from Day 4 at the Australian Open on Wednesday
The current Olympic champion Italy's Marcell Jacobs, who has had a wretched time with injury since his shock Tokyo success, looked a little sluggish in finishing second in 10.05 behind Nigerian heat winner Kayinsola Ajayi (10.02).
Local favourite Thompson saved three match points before prevailing 5-7, 7-6 (6), 6-3 against Nadal, who was playing his first tournament after nearly a year out with a hip injury.
Jamaican Usain Bolt and Elaine Thompson both made the shortlists for the IAAF's World Athlete of the Year awards on Wednesday after cleaning up the sprint golds at the Rio Olympics.
Soren Thompson defeated world number two Alfredo Rota but then lost to the defending champion Pavel Kolobkov of Russia.
James Anderson will retire from Test cricket after the first match of the series against West Indies at Lord's this year.
Jannik Sinner's stupendous year may have been clouded by an anti-doping controversy but on the court he is finishing the season like an express train and has won 25 of his last 26 matches.
Canada powered into the quarter-finals of the Davis Cup for the third straight year with a victory over Britain on Sunday.
Another day, another milestone reached for Novak Djokovic as he racked up Grand Slam victory number 350.
A phone call with his therapist after a worrying semi-final helped propel Noah Lyles to the top of the Olympic podium on Sunday.
Images from the Olympics swimming action at the La Defense Arena, Paris, on Wednesday.
Following a victory over Alexei Popyrin at the Queen's Club Championships in his 1,000th tour-level singles contest, Murray withdrew due to the injury while trailing 4-1 in the first set of his second-round match with Jordan Thompson on Wednesday.
Murray, who in 2013 ended a 77-year wait for a British men's singles champion at Wimbledon and won the title again in 2016, had previously said he was unlikely to continue his career beyond this year and could bow out at the Olympics in Paris.
Former world number one Andy Murray celebrated his 1,000th tour-level singles match by beating Alexei Popyrin 6-3, 3-6, 6-3 to reach the second round at the Queen's Club Championships on Tuesday.
Nadal expresses doubt over Australian Open participation
Lyles and Hassan bookend fabulous Paris programme
Lopez was cheered on by 22-time Grand Slam champion Nadal during his final event as a professional.
Images from the men's singles Round of 16 matches at the US Open on Monday.
Earlier, title holder Borna Coric beat American Sebastian Korda 7-6 (5), 6-4, while another home hope Taylor Fritz survived a first-set thriller to beat Czech Jiri Lehecka 7-6 (14), 6-2.
India's Yuki Bhambri and his French partner Albano Olivetti crashed out of Marrakech Open after losing the hard-fought semifinal to second seeds Lucas Miedler and Alexander Erler of Austria.
Kenyan Beatrice Chebet shattered the women's 10,000 metres world record at the Prefontaine Classic on Saturday, as Britain's Josh Kerr beat arch-rival Jakob Ingebrigtsen in the mile race at the Eugene Diamond League meet.
Rafa Nadal returned to action for the first time since January at the Brisbane International on Sunday, losing his doubles match but overall showing no obvious after-effects of the hip injury that ruined his year.
A wrap from Day 2 of the World Athletics Championships 2023 in Budapest on Sunday.
Thompson, ranked 84, was more aggressive in a tighter second set and went 6-5 up with a service hold before breaking a tiring Griekspoor in the next game to drag himself into the contest.
Images from the Olympics swimming action at the La Defense Arena, Paris, on Thursday.
Spain's Rafael Nadal said on Wednesday that he is not sure if he will be able to play at next month's French Open.
Rafael Nadal said a MRI scan had shown a micro tear on a muscle.
Here are the highlights from the world athletics showpiece...
Australia beat Croatia 2-1 on Friday in Malaga, Spain, to reach the Davis Cup final for the first time in 19 years and will next face either Canada or Italy.
