When it was time for one of the biggest matches in the U.S. Open to go down between tennis sisters Venus ans Serena Williams on Tuesday (September 9), A-listers from all walks of life headed to the stands. And while it was Serena's victory over big sister Venus that certainly stole all the headlines, the match was also good for another sport: celebrity watching. Alan Cumming, Jill Zarin, Gigi Hadid and her crew (including pal Kendall Jenner and boyfriend Joe Jonas), Gladys Knight, Candice Bergen, U.S. open regular Anna Wintour, Donald Trump, John McEnroe, Aziz Ansari, Dr. Oz, Kim Kardashian, Nas, and BFFs Oprah Winfrey and Gayle King all managed to snag a seat to the highly-anticipated match.
Most eyes were glued to the game, but some celebrities also made time to head to Instagram to share their experience. For instance, Kendall and Gigi smiled wide for a selfie.
Same went for Gayle and Oprah.
And RHONY alum Jill Zarin also made sure she got in on all the fun.