Defending champion Sinner needed just 81 minutes to administer a brutal 6-1, 6-1, 6-1 drubbing to reach the last eight.

Bublik -- who described Sinner as "like an AI-generated player" shortly before walking onto the Arthur Ashe Stadium court -- embraced the Italian after the drubbing, and could be heard exclaiming: "You're so good, this is insane."

"I felt like today I was playing some great tennis, and I managed to break him very early, which gave me then the confidence to serve a little bit better and play from the back of the court a bit better," said Sinner.

The top seed steered clear of questioning Bublik's effort during a match in which he made two underarm serves and racked up 13 double faults.

"Sometimes we have days off where certain things doesn't work," he said. "Some players, they have some problems behind the scenes, you never know.

"Obviously people come here to see some great tennis matches, some great battles, and not always that's the case."