Video: Tennis commentator shows up Roger Federer with cracking through the legs winner

Bet Fed wasn't expecting this

Tennis legend Roger Federer got more than he bargained for when he invited a commentator onto the court to hit a few balls. The Swiss star brought German Eurosport broadcaster Matthias Stach on after his victory in the final at the Halle Open, and got a bit of a shock when the jeans wearing Stach fired this incredible winner past him. https://twitter.com/TennisTipsGuy/status/612936320739115008