A bawling Zverev yells in pain and is wheeled off the court in a Wheelchair.

RAFA NADAL is on track to win a record-extending 14th French Open title after Alex Zverev retired injured in heartbreaking scenes.

In the 12th game of the second set, Zverev twisted his right ankle while attempting to retrieve a Nadal shot in a physically draining match that had lasted more than three hours.

The German, 25, collapsed to the ground and screamed in agony, his screams echoing throughout Court Philippe-Chatrier.

The world No.3 needed assistance getting to his feet and had to leave the court in a wheelchair after receiving a medical timeout backstage.

He returned about five minutes later.

Sienna Miller, a Hollywood actress, was close to the incident and was left stunned, putting her hand to her mouth.

Nadal has never lost a final in Paris and will be confident of extending his dominance against either Croatian Marin Cilic or Norwegian Casper Ruud on Sunday.

It’s been a wild match, and the first set, which Nadal won in a tie-break, lasted an incredible 98 MINUTES.

Nadal, who turns 36 today, saved four set points to take a one-set lead.

It didn’t matter in the end because Zverev was greeted with a standing ovation and someone else had to pack his tennis bag.