Former champion Dominic Thiem's final appearance at the US Open ended tamely on Monday after he was beaten 6-4,6-2, 6-2 in the first round by American Ben Shelton.
The Austrian has struggled to reproduce the form that carried him to the 2020 Flushing Meadows title and announced he would retire from the sport this season after being troubled by a wrist injury in recent years.
Shelton leaned on his powerful forehand and sent over eight aces to open the action on Arthur Ashe Stadium, as the 21-year-old hopes to recapture the magic of his charmed run to the semi-finals 12 months ago.
Despite struggling with his serve, Thiem showed he had some fight left in him as he fended off two break points in the 10th game but a relentless Shelton forced him into an error to break him on the third attempt to take the opening set.
The American extinguished Thiem's lone break point opportunity in the opening game of the second set and the Austrian handed Shelton a break in the second game with a double fault and an unforced error.
Shelton showed he could be a threat over the next two weeks as he broke Thiem again to close out the second set. He ran away with the match in the third set, pummeling 34 winners in a confident performance.
Thiem, who hoisted the trophy in front of empty stands in the midst of the COVID-19 pandemic, stayed back on court for ages on Monday to sign memorabilia for fans.
"It's actually a really important moment for me because I [had] my greatest success of my career in this weird 2020.
"It was strange and different circumstances and unfortunately I had this success without any of you. So that was of course a really amazing moment, but on the other hand, also pretty sad.
"I am super happy I got the chance to play my last US Open match on this court," Thiem said.
"I can now spend some time with you guys to say thank you to all of you and to make the time up that we missed four years ago."
Thiem said he had no regrets retiring at 30.
"I think the basic reason why I'm here now retiring pretty young is still the bad luck with the wrist injury," Thiem said Monday afternoon. "But again, like, I'm really happy with the career I had before. I never expected [to] be that successful, so I don't have really any regrets, and I'm good with that."
