German third seed Alexander Zverev retired injured from his French Open semi-final against 13-time champion Rafael Nadal after rolling his right ankle badly on Friday.
"Tough now. Very sad, he was playing an unbelievable tournament, he`s a very good colleague on the tour," Nadal said. "I know how much he`s fighting to win a Grand Slam."
The German had been giving the 13-time Roland Garros champion a run for his money until he screamed out in agony after rolling his right ankle in the final point of the 12th game of the second set.
He was trailing Nadal 7-6(8) 6-6 when the match ended abruptly.
After several minutes off-court, he returned to the Philippe Chatrier arena on crutches to concede the match.
Zverev twisted his ankle as he tried to retrieve a shot in the 12th game of the second set and screamed in pain before being taken off the court Philippe Chatrier in a wheelchair.