WATCH: Venus’ bullet leads to a hilarious Federer tweet

Venus Williams is in such rampaging form at the US Open that she’s even injuring ball boys!

Her legendary male compatriot Roger Federer poked some fun at the incident on Twitter, cleverly using emojis to illustrate the poor young man’s anguish.

Williams is the oldest woman entered at 37 but was this year’s Wimbledon and Australian Open runner-up.

She’ll face Petra Kvitova in her quarterfinal on Tuesday.

She hasn’t reached three Slam finals in a year since 2002.

“I’m focused on myself and trying to be as aggressive as possible,” Williams said.

“Nobody ever gives you a Slam. You’ve got to take it and I’m going to try and take it.”