Alexander Zverev of Germany receives medical attention as Rafael Nadal of Spain looks on Friday in the men's semifinal match at the French Open.
Mandatory Credit:	Clive Brunskill/Getty Images

Alexander Zverev of Germany receives medical attention as Rafael Nadal of Spain looks on Friday in the men's semifinal match at the French Open.
Mandatory Credit: Clive Brunskill/Getty Images

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Rafael Nadal advances to men's French Open final after Alexander Zverev retires due to injury

Spanish tennis star Rafael Nadal advanced to the men's French Open final on Friday, after opponent Alexander Zverev was forced to retire due to an injury.