World number one Jannik Sinner outclassed Alex Michelsen in straight sets to reach the third round of the US Open.
Italy's Sinner beat the American 6-4 6-0 6-2 for his 50th victory of the year.
Australian Open champion Sinner is playing at his first tournament since it emerged he had been cleared of any wrongdoing after twice testing positive for a banned substance earlier this year.
The 23-year-old will play Australian Chris O'Connell in the third round in New York.
Sinner had wobbled against American Mackenzie McDonald in the first round on Tuesday, losing the first set before rallying to triumph 2-6 6-2 6-1 6-2 at Flushing Meadows.