Britain's Cameron Norrie was unhappy that an "absurd" call from the umpire changed the momentum of his French Open match against France's Benoit Paire.
After winning the first set, Norrie was penalised for hindrance early in the second after being ruled to have put off Paire by shouting mid-point.
Paire broke serve and won the next two sets, before 14th seed Norrie fought back to win 7-5 4-6 3-6 6-1 6-4.
"I've never been called for that. I think it's unacceptable," Norrie said.
"Both of us didn't know why he called it. I think Benoit thought it was for him, both of us were a bit confused.