Kei Nishikori became the first Japanese man in 75 years to reach the French Open's fourth round.
The 13th-seeded Nishikori beat No. 24 Benoit Paire of France 6-3, 6-7 (3), 6-4, 6-1 on Saturday, with Paire docked a point for being coached at a key moment during the match.
Paire had a set point while leading 5-4 in the second and Nishikori serving. But Paire was given a point penalty by chair umpire Enric Molina for coaching, which is not allowed at Grand Slam tournaments, and Nishikori wound up holding serve.
Paire did manage to win that set, anyway, but he was broken in the last game of the third when he missed a drop shot.
Paire said later that his coach, Lionel Zimbler, was merely putting his hands in the air to offer encouragement. Zimbler moved both hands forward in a kind of pushing motion.
''For sure, it's not fair. You see every coach do the same thing,'' Paire said. ''If it's the best player in the world, (Molina) doesn't (give a)...