MONTREAL (AP) — Jo-Wilfried Tsonga pulled out a stunning victory over Roger Federer and Juan Martin Del Potro followed with a two-set win over Rafael Nadal on Friday as both advanced to the semifinals of the Rogers Cup.

Down 5-1 in the third set, Tsonga broke serve twice and then beat Federer in the tiebreaker for a 7-6 (5), 1-6, 7-6 (3) quarterfinals victory.

Del Potro broke Nadal’s service twice for a 3-0 lead in the second to set up a 7-6 (5), 6-1 win. Nadal was the defending Rogers Cup champion.

In other quarterfinals, fifth-seeded Andy Roddick recovered from a second-set service break to down Serbia’s Novak Djokovic 6-4, 7-6 (4) and will next face del Potro, while third-seeded Andy Murray had a 6-2, 6-4 win over Russian Nikolay Davydenko to set up a clash with Tsonga.

Both Federer and Nadal entered the tournament after time off.

Federer’s wife gave birth to twin daughters while Nadal had 10 weeks off to ease tendinitis in both knees.

“I did not feel real good - 5-1 down and Roger playing well and I had no solutions,” said the seventh-seeded Tsonga. “I just told myself ‘you have to hit the ball one more time than him’ and I did it.

“It’s a good thing for me. It’s amazing to change this match.”

Top-seeded Federer looked to be coasting to a victory when he started struggling on serve just as the Frenchman seemed to find his form.

“It’s disappointing but that’s what Jo does - he doesn’t make a return for an hour and then he puts in a few and than all of a sudden he’s back in the match,” Federer said. “I should never have allowed it but it happened, so it’s a pity.”

The Swiss forced a final tiebreaker, but Tsonga used two aces to take the lead and then saw Federer double-fault on match point in the tiebreaker.

“It’s a tough match to go through because it was either very close or very one-sided,” Federer said. “That doesn’t make it easy on the rhythm.”