Thiem said he had no regrets retiring at 30.
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.
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.
Dominic Thiem defeated qualifier Facundo Bagnis of Argentina 6-4, 7-5 in the first round of the Plava Laguna Croatia Open Umag
Hurkacz, Swiatek win as Poland march into United Cup final
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.
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.
He will start his 2022 season in South America at the Cordoba Open in Argentina at the end of January.
World number two Nadal's fate will rest on his final group match against Tsitsipas.
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.
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.
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.
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.
Organisers made Thiem move out and the Austrian was fuming at being treated like 'a junior'.
Zverev fresh for Australian Open final after being spared gruelling Djokovic test
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.
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.
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.
Dominic Thiem has reached a Grand Slam final three times - only to lose on each occasion
Thousands of mask-free spectators flocked into the stadium
Alexander Zverev won the first set 7-6, but Novak Djokovic has been forced to withdraw from the match due to injury from the Australian Open semi-final on Friday.
Thiem had already sealed a place in the semi-finals after group wins against Roger Federer and Novak Djokovic, while Berrettini could not progress.
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.
Jannik Sinner retained his Australian Open title with an emphatic 6-3, 7-6(4), 6-3 win over Alexander Zverev on Sunday
Dominic Thiem will watch a treasured home movie of his recent win over Novak Djokovic at the season-ending ATP Tour Finals as he seeks inspiration to take down the defending champion Serb in the Australian Open decider.
The unpredictable nature of the 2024 US Open has turned it into one of the most thrilling Grand Slam tournaments in recent memory.
Nadal said the two-week gap between the French Open and Wimbledon was not enough time for him to recuperate
Thiem, who also played in the charity event but did not contract the virus, told Austrian media that Kyrgios had "made a lot of mistakes" and should not criticise others.
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.
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.
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.
World number five Dominic Thiem heads into Friday's Australian Open semi-final against Alexander Zverev knowing he will have to put their friendship aside to continue his charge towards a maiden Grand Slam title.
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.
'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'
Grit, determination, nerves were all on show at the US Open final.
Stefanos Tsitsipas confirmed his meteoric rise into the highest echelon of men's tennis by battling back to beat Austrian Dominic Thiem 6-7(6) 6-2 7-6(4) in a compelling title duel at the ATP Finals on Sunday.
German seventh seed Alexander Zverev recovered from a slow start to beat former champion Stan Wawrinka 1-6, 6-3, 6-4, 6-2 in the Australian Open on Wednesday to reach his first career Grand Slam semi-final. Swiss Wawrinka, who won the first of his three Grand Slams at Melbourne Park in 2014, broke Zverev twice early in the opening set to breeze through the opening set but the 22-year-old German came roaring back into the contest.
Novak Djokovic kicked off his season in style with a 7-5, 7-5 win over Canadian talent Denis Shapovalov on his favourite Rod Laver Arena court on Tuesday before returning to lead Serbia to a doubles victory that sealed their ATP Cup opener 2-1.