At this point, we're starting to wonder who ISN'T at the U.S. Open, because it seems like everyone and their mom is there!!
More and more celebs are making their way to New York to watch some of the top tennis players in the world, and Elizabeth Olsen and Jon Hamm were spotted at the Billie Jean King Tennis center for some second round action!
The youngest of the Olsen sisters looked fab as she treated the famed venue as her own personal runway, wearing a black top and a pair of shades!
Meanwhile, Jon traded in his tuxedo for the day and went for a more casual look in a button up shirt and a St. Louis Cardinals baseball cap!
And is it just us, or is Don Draper looking a little rugged lately!?
There's still plenty of tennis to be played in the U.S. Open, and at this point, we can't help but wonder who's gonna show up next!
[Image via NewsWhistle/AKM-GSI.]