Croatian qualifier Dino Prizmic defeated Novak Djokovic in the second round of the Italian Open, marking Djokovic's first opening match loss at the tournament in 19 appearances.
Djokovic, 38, is winless on clay this year after exiting the Monte Carlo Masters and Madrid Open with straight-sets losses last month, and his form is a concern heading into Roland Garros, which kicks off on Sunday.
Rafael Nadal made a triumphant return to Roland Garros on Sunday
Summary of sports events and persons who made news on Sunday
The defending champion did not require his dazzling best against 80th-ranked Hungarian Marton Fucsovics in his first match scheduled during the day session but still emerged a comfortable 6-4, 7-6(3), 6-2 winner.
World number one Novak Djokovic had to work hard for a three-set victory over Hungarian Marton Fucsovics at the Paris Masters on Tuesday in his first match since losing the U.S. Open final in September.
Talk about a man in a hurry -- 10th seed Ben Shelton required just 55 seconds to finish off Australian Rinky Hijikata and reach the Wimbledon third round on Friday.
India's Rohan Bopanna and his Romanian partner Marius Copil got off to a rousing start at the French Open, knocking out sixth seeds Raven Klaasen and Michael Venus in the first round, in Paris, on Tuesday.
Alexander Zverev has been ordered by a Berlin court to pay an undisclosed fine for physically abusing the mother of his child.
ITF said that Novak Djokovic's statement at the French Open did not break any rules.
Seven-times champion Novak Djokovic scored his 100th match win at Wimbledon and led the march of the old guard into the last 16 on Saturday while an ailing Barbora Krejcikova's title defence ended in defeat and tears.
Djokovic raced into a 3-0 lead before his opponent found his rhythm to set up three break points at 4-2.
Images from Day 2 of the 2024 French Open at Roland Garros in Paris on Monday.
Novak Djokovic, chasing a record 23rd Grand Slam title, has said he was not holding back and would do it again. He is set to play his second-round match later on Wednesday against Hungary's Marton Fucsovics.
Top-ranked Iga Swiatek of Poland faces Irina-Camella Begu of Romania in the opening round of the women's draw with second-seeded American Coco Gauff taking on Australian Ajla Tomljanovic.
The 25-year-old Medvedev, who has played Grand Slam finals at the Australian and US Opens, is certainly expecting to go through to the second round at Roland Garros.
Federer, Djokovic headline Day 2 at Flushing Meadows
Novak Djokovic began his French Open campaign with a comfortable win.
Top seed Roger Federer was finally forced to work hard for a win at the Swiss Indoors tournament as he fought back to beat Adrian Mannarino 4-6, 6-1, 6-3 in his quarter-final on Friday.
'Everyone always talks about how hot Melbourne is but the US Open's way worse'
Images from Day 9 of Wimbledon at the All England Lawn Tennis and Croquet Club in London, on Wednesday.
Images from Day 5 of the 2023 Australian Open at Melbourne Park on Friday.
Coco Gauff rallied from a break down in the final set to beat Swede Rebecca Peterson and reach the Indian Wells quarter-finals for the first time
Novak Djokovic suffered his first defeat of the new season in the Qatar Open semi-finals on Friday, losing in three sets to Spain's Roberto Bautista Agut.
Stefanos Tsitsipas enjoyed an incident-free path into the third round of the French Open with a win over Roberto Carballes Baena.
Feliciano Lopez has denied any involvement in match-fixing after his name was mentioned in a media report concerning a doubles match with fellow Spaniard Marc Lopez.
Nagal got the Chinese engaged in baseline fight from the beginning and drew the first blood in the very first game of the match.
Simona Halep's powers of recovery will be put to the test on day eight of the Australian Open on Monday when the world number one meets Japan's Naomi Osaka in a tricky fourth round clash.
Images from the matches played on Day eight of the 2018 Australian Open at Melbourne Park on Monday
After a brief interruption when the players were locked at 5-5 in the opening set, Federer saved two set points in the tiebreak and held firm to gain the upper hand in the contest.
Andy Murray claimed the biggest win of his comeback and a place in the last 16 of the Western and Southern Open on Monday by taking out self-destructing fifth seed Alexander Zverev 6-3, 3-6, 7-5.
A summary of Tuesday's action at the US Open.
IMAGES from Day 1 of the Wimbledon Championships, at the All England Lawn Tennis and Croquet Club, London, on Monday.
Carlos Alcaraz came through a testing third round encounter against Nicolas Jarry.
Favourites Russia Tennis Federation opened their Davis Cup Finals campaign with a resounding victory over Ecuador, Britain began with a win against France and Italy eased into the quarter-finals with a win over Colombia on Saturday.
Images from Sunday's action at the Australian Open in Melbourne.
Copil, the World No 93, stunned second seed Alexander Zverev of Germany 6-3, 6-7 (6), 6-4 in the day's other semi-final.
Serena, a six-times champion in New York who is seeded 17th, will start her campaign against Polish world number 60 Magda Linette and could face Venus in the third round before a possible fourth-round showdown with Romanian top seed Halep.
Roger Federer has never struggled for ways to win matches at the Australian Open but in beating John Millman to chalk up his 100th on the Melbourne hardcourts the 38-year-old Swiss found himself in uncharted territory on Friday. For the first time Federer experienced the Australian Open's unique system for ending prolonged contests, a so-called 'super breaker' -- a first to 10-point tiebreak activated when the score reaches six games all in deciding sets.
Croatian Marin Cilic prepares to try to stop the Swiss claiming a sixth Australian Open title on Sunday.