The world’s top women’s tennis player lost her cool — and nearly hurt a ballboy in her fit of rage.

While blowing her semifinal match to Jessica Pegula on Saturday at the Wuhan Open, Aryna Sabalenka threw her racket down onto the court after hitting a backhand out of bounds, and it narrowly missed bouncing into a ballboy standing next to the umpire’s chair.

“That is dangerous territory for Sabalenka, this semifinal has exploded into life in the last 10 to 15 minutes,” a member of the Sky Sports broadcast said, according to The Sun .

“Sabalenka gets a warning for the racket abuse, but she is lucky it is not more.”

belarusian tennis player and world number one aryna sabalenka gets mad and almost hits a ball kid with her racket, absolutely shocking behavior😳 pic.twitter.com/GAwwL0xQK8

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