Alexander Zverev's Roland Garros dream ended by sudden ankle injury in semifinal with Rafael Nadal

Alexander Zverev's Roland Garros dream came to a crushing end Friday when his right ankle buckled with Rafael Nadal serving at 5-6, 40-30 in their second set. The unfortunate scene and aftermath:

Moving out wide, Zverev's right ankle turned.

Those watching soon heard the German cry in pain when he went down.

Nadal immediately rushed over...

... as his opponent was put in a wheelchair.

After being examined, the No. 3 seed returned with Nadal by his side...

... where he officially retired from the clash, trailing, 6-7 (8), 6-6.

The Chatrier crowd chanted Zverev's name as he said farewell.