Players are firing tennis balls over 100 m.p.h. and sometimes somebody's head gets in the way. During the semifinal match in Rome between Novak Djokovic and Diego Schwartzman, the world No. 1 accidentally sent a ball flying into the head of a ball boy.

Thankfully, the boy seemed OK, with Djokovic running over to give him a high five and an apology before getting back to the match.

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Djokovic faced Rafael Nadal in the finals, losing 6-0, 4-6, 6-1.