Thiem bids farewell to US Open after being hammered by 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.
