Reigning champion Jannik Sinner sailed into the US Open semi-finals on Wednesday with a straight-sets win over 10th seed Lorenzo Musetti.

World number one Sinner swept aside Musetti 6-1, 6-4, 6-2 in the first all-Italian men's quarter-final in Grand Slam history.

"We have to take the friendship away for the match and when we shake hands everything is fine again," said Sinner, who is 16-0 against Italian players.

"It was a great performance, very solid. I started the match very well."

He advances to a semi-final against Canadian 25th seed Felix Auger-Aliassime.

"Every player who is in the semis of a Grand Slam can say they're playing their best tennis," added Sinner.

Auger-Aliassime has won two of three previous meetings but Sinner thrashed him for the loss of just two games in Cincin

See Full Page