10 US Open Tennis Facts That Could Surprise You

Running¬†through the first two weeks of September in New York City,¬†the U.S. Open is the final grand slam professional tennis tournament of each year. But did you know it didn’t even used to be played by professionals? This is among several interesting, historical tidbits about the annual event.

1. It's been played on three surfaces

The U.S. Open is currently a hard court tournament, but it was formerly played on grass as well as on clay. Jimmy Connors is the only player in history to have won US Open singles titles on all three surfaces, and Chris Evert is the only woman to win it on two surfaces (clay, hardcourt).