Tommy Haas and Janko Tipsarevic took part in Air Tennis at the Mercedes Cup in Stuttgart. The pair went in a mobile wind tunnel with 180 km/h air flow.
According to the ATP, Tipsarevic thought he was going to be jumping out of a plane through a misunderstanding with his manager, but was still thrilled about the opportunity to take part in such a unique off-court activity. Skydiving seems like a hard thing to misunderstand.
(Photos/Video: ATP World Tour)