French duo Jo-Wilfried Tsonga and Gael Monfils are through to the US Open quarter-finals following impressive victories.

Tsonga beat American Jack Sock in four sets on Sunday to reach the last eight for the second straight year, while Monfils swept aside Marcos Baghdatis 6-3 6-2 6-3.

After failing to covert one match point in the third-set tiebreaker, the ninth-seeded Tsonga dominated the fourth for the 6-3 6-3 6-7 (7-9) 6-2 victory.

Sock, the last man from the United States left in the draw, was trying to reach his first major quarter-final.

The 26th-seeded Sock upset 2014 US Open champ Marin Cilic in the third round, never facing a break point. But on Sunday, he had just five aces and was broken six times.

The US Open is the only major at which Tsonga, the 2008 Australian Open runner-up, has not reached at least the semi-finals.

Tsonga could next face top-ranked Novak Djokovic, who faces 21-year-old Kyle Edmund later on Sunday.

Monfils’ win meant he improves to 18-2 in matches he’s played since a first-round loss at Wimbledon.

That stretch includes the highest-level tournament title of his career at Washington.

Three days after his 30th birthday, there were still classic Monfils moments – including an attempt to tie his shoe in the middle of a point.

But he has yet to drop at set at this US Open.

The 31-year-old Baghdatis hadn’t reached a grand slam round of 16 since the 2009 Australian Open.