Kim Kardashian & Kendall Jenner Attend the U.S. Open to Watch Serena & Venus' Match!

Kim Kardashian and her younger sister Kendall Jenner are joined by a group of friends to watch Serena and Venus Williams‘ match at the 2015 U.S. Open on Tuesday (September 8) in New York City.

The sisters were joined in the suite by Gigi Hadid and Joe Jonas, their pal Cully Smoller, and Kim‘s BFF, PR guru Simon Huck.

While it will probably be hard for fans of the tennis stars to pick a favorite in the match, we’re going to guess that Kim is rooting for Serena as they were seen grabbing dinner just the night before!

50+ pictures inside of the celebs attending the tennis match…