PARIS (AP)—Jo-Wilfried Tsonga retired in the fourth round of the French Open after losing the first set 6-2 against Mikhail Youzhny of Russia on Sunday.

Tsonga called the tournament doctor at 5-2 at the changeover and complained about leg pains. He returned to the court only to lose the next game and then retired—meaning there is no French player left in the tournament.

Tsonga said he probably picked up the injury during his four-set win over Thiemo De Bakker in the previous round.

“I can’t tell you exactly what it is for the moment,” Tsonga said. “I spoke with the doctor and it’s likely a lesion on the psoas muscle (in the right hip). I will undergo an MRI tomorrow.”

The eighth-seeded Tsonga was bidding to reach the quarterfinals at his home Grand Slam for the first time after losing in the fourth round last year.

“This event is too big (to withdraw), I wanted to give it all I got,” he said. “Nobody will blame me for fighting.”

The 11th-seeded Youzhny reached the quarterfinals at the French Open for the first time. He will next face either fourth-seeded Andy Murray of Britain or Tomas Berdych of the Czech Republic.