foursquare's latest badge celebrates America's premier annual tennis tournament- the US Open.
Earning the badge is (relatively) easy. Just like the US Open on foursquare and then check-in to any venue marked "tennis court" and you will receive your new badge and see the following message:
You’re now a part of tennis’ biggest stage. World-class athletes, electrifying action, and you! Keep the rally going and enjoy the US Open Tennis Championships!Good luck and keep working on the backhand!