Sinner, whose coach stated he was “physically and mentally” worn down by the investigation, discovered himself a set and a break down after a poor begin on Arthur Ashe Stadium.
However he discovered his footing halfway by way of the second set and it was plain crusing from there for the 23-year-old.
Sinner stated the general response to information that he had examined constructive twice for a banned substance was “not dangerous”.
“The response from followers, I really feel it has been nice – all through when the information got here out, within the observe periods, there was a variety of help, which I am very glad and completely satisfied about that,” Sinner stated in a information convention.
Requested concerning the response from different gamers he stated: “I can’t management the gamers’ response, and if I’ve one thing to say to somebody, I’m going there privately, as a result of I am this type of particular person.”
Alcaraz, against this, began strongly, rapidly discovering himself a set and a break up earlier than the unforced errors began to creep up.
Nevertheless, he readjusted properly within the third set and was dominant within the fourth, ending with 50 winners to his opponent’s 19.
Alcaraz is bidding to change into the third man in historical past after Rod Laver and Rafael Nadal to win the French Open, Wimbledon and the US Open in the identical calendar yr.
When requested concerning the statistic on ESPN, he joked: “Effectively, after this interview I’m going to attempt to faux I by no means heard that.
“Clearly it will be an amazing achievement if I make it, however it will be tough.”
He and Sinner are the favourites to problem defending champion Novak Djokovic, who beat Alcaraz simply three weeks in the past to clinch Olympic gold.