Dominic Thiem defeated qualifier Facundo Bagnis of Argentina 6-4, 7-5 in the first round of the Plava Laguna Croatia Open Umag
Grit, determination, nerves were all on show at the US Open final.
Thiem said he had no regrets retiring at 30.
Felix has gone past the opening round of a major for the first time since the 2023 Australian Open.
Dominic Thiem, U.S. Open winner in 2020, has secured a place in the main draw of the Australian Open after the withdrawal of Reilly Opelka, the tournament organisers confirmed on Friday.
Novak Djokovic's bid for a record 25th Grand Slam title kicked off on Monday with an easy win over qualifier Radu Albot in the US Open first round.
He will start his 2022 season in South America at the Cordoba Open in Argentina at the end of January.
He made a solid start against France's Adrian Mannarino to take a 5-2 lead in the opening set but injured his wrist in the eighth game before retiring.
Dominic Thiem produced a remarkable fightback to beat German fifth seed Alexander Zverev 2-6, 4-6, 6-4, 6-3, 7-6(6) to win the US Open for the first time on Sunday.
World number two Nadal's fate will rest on his final group match against Tsitsipas.
The ATP Finals, in its 50th edition, is being staged in London's O2 Arena for the 12th and last time before it moves to Turin and sadly plans for a vibrant farewell party in front of the usual sell-out crowds has been scuppered by the COVID-19 pandemic.
Dominic Thiem fell in straight sets to Rafael Nadal in the 2018 French Open final but took the 12-time Roland Garros champion to four sets last June. On Sunday, the Austrian appeared to be heading towards a four-set victory before Djokovic mounted a spectacular comeback to deny him again.
Top seed Dominic Thiem survived an early scare and fought back from a set down to beat Argentina's Diego Schwartzman 3-6, 6-4, 6-3 and win his first Vienna Open title on Sunday.
Thiem had already sealed a place in the semi-finals after group wins against Roger Federer and Novak Djokovic, while Berrettini could not progress.
Dominic Thiem has reached a Grand Slam final three times - only to lose on each occasion
Second seed Dominic Thiem celebrated his 27th birthday with a commanding 6-3, 6-3, 6-2 victory over India's Sumit Nagal on Thursday to move into the third round of the US Open.
Dominic Thiem will clash with Serbia's Novak Djokovic in the men's singles final of the Australian Open. The Austrian made the title round with a 3-6, 6-4, 7-6(3), 7-6(4) victory Germany's Alexander Zverev in the second semi-final at Melbourne Park on Friday. Djokovic beat great rival Roger Federer 7-6(1), 6-4, 6-3 in the first semi-final on Thursday.
It was a battle of wills out on court at the USTA Billie Jean King National Tennis Center on Tuesday, with the proceeding stretching to nearly 5 hours -- four hours and 50 minutes precisely.
World number three Dominic Thiem is "extremely sorry" for the way players conducted themselves at Novak Djokovic's Adria Tour exhibition event after which four players tested positive for the novel coronavirus, the Austrian said on Thursday. Djokovic, Grigor Dimitrov, Borna Coric and Viktor Troicki tested positive after playing in the charity tournament in Serbia and Croatia, which drew big crowds and saw players pose for pictures together.
Hurkacz, Swiatek win as Poland march into United Cup final
Thiem, the fourth seed, was leading 3-1 in the third set on Friday when the semi-final was interrupted by rain and then surprisingly abandoned for the day.
Thiem became the first Austrian since Thomas Muster in 1996 to reach the final of the claycourt tournament after subduing Murray for the first time in his career.
Second seed Dominic Thiem edged a first-set tiebreak before turning up the heat to romp into the US Open quarter-finals with a resounding 7-6(4), 6-1, 6-1 victory over Canadian youngster Felix Augur-Aliassime at Arthur Ashe Stadium on Monday.
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.
Austrian Dominic Thiem beat Kevin Anderson for the first time at the seventh attempt to reach the Madrid Open final for the second successive year on Saturday.
Rafael Nadal's dominance on the red claycourts in Paris is unmatched, the Spaniard picking up his 13th French Open trophy last year to match Roger Federer's 20 Grand Slam singles titles.
Dominic Thiem said he felt there were sections of society that needed more urgent help during the economic crisis caused by the pandemic than his fellow competitors. He criticised the attitude of some players on the lower-tier Futures circuit, which he said meant they did not deserve handouts from the sport's top players.
Roger Federer's struggles continued when he was beaten 7-6 (2), 6-4 by fast-rising Austrian Dominic Thiem in the third round of the Italian Open in Rome, on Thursday.
It will motivate him to keep working hard and move to the top 100, feels India's Davis Cup captain Mahesh Bhupathi
Thiem 'bagaled' Nadal at the US Open -- his first bagel set in 14 years and just his fourth ever 'bagel' set at the Slams -- to claim the first set, but the relentless matador from Spain fought back to claw his way into the match and script a 0-6, 6-4, 7-5, 6-7 (4/7), 7-6 (7/5) to reach the semi-finals for the seventh time.
'It's such an honour to win this tournament, looking at all the names who have won it I'm very happy and proud that my name is also there now'
Former world number one Simona Halep stepped up her French Open preparations with a 6-4, 6-4 victory over American Coco Gauff to march into the quarter-finals of the Madrid Open on Monday while Andy Murray won on clay for the first time in five years.
Former world number one Rafa Nadal wasted a match point as he slipped to a surprise semi-final loss to Austrian Dominic Thiem on his beloved clay at the Argentina Open on Saturday.
Defending champion Rafael Nadal failed to win a single game in the opening set of his US Open quarter-final against Dominic Thiem on Tuesday but fought back to beat the Austrian 0-6, 6-4, 7-5, 6-7 (4), 7-6 (5) in match that ended past 2 am in New York.
Novak Djokovic endured a fierce challenge to his Melbourne Park reign before overhauling Dominic Thiem 6-4, 4-6, 2-6, 6-3, 6-4 on Sunday to clinch an eighth Australian Open crown and reclaim the world number one ranking. He captured the decisive break in the third game of the final set, then held firm as Thiem made desperate assaults on his serve. Going for broke in a nerve-shredding final game, the fifth seeded Austrian went for the lines but missed twice to hand Djokovic one of his most hard-earnt triumphs.
Dominic Thiem staged a stunning comeback to win 2-6, 4-6, 6-4, 6-3, 7-6(6) in a nerve-jangling battle of wills and will now head to the French Open with renewed confidence.
Defending champion Rafael Nadal thrashed Austrian fifth seed Dominic Thiem 6-0, 6-2 to reach the semi-finals of the Monte Carlo Masters for a record 14th time on Friday.
Austrian Dominic Thiem became the first player to capture titles on three different surfaces this year when he finished off Philipp Kohlschreiber to win the Mercedes Cup in Stuttgart on Monday.
The Austrian spent four days in bed with a virus after pulling out of a tournament in Doha last week.
The unpredictable nature of the 2024 US Open has turned it into one of the most thrilling Grand Slam tournaments in recent memory.