Ivo Karlovic of Croatia returns the ball to Roger Federer of Switzerland during their semi final match of the ATP tennis tournament in Halle, Germany, 20 June 2015. EPA/MAJA HITIJ
Roger Federer of Switzerland returns the ball to Ivo Karlovic of Croatia during their semi final match of the ATP tennis tournament in Halle, Germany, 20 June 2015. EPA/MAJA HITIJ
Ivo Karlovic of Croatia returns the ball to Roger Federer of Switzerland during their semi final match of the ATP tennis tournament in Halle, Germany, 20 June 2015. EPA/MAJA HITIJ
Roger Federer of Switzerland returns the ball to Ivo Karlovic of Croatia during their semi final match of the ATP tennis tournament in Halle, Germany, 20 June 2015. EPA/MAJA HITIJ
Roger Federer of Switzerland celebrates after winning against Ivo Karlovic of Croatia in their semi final match of the ATP tennis tournament in Halle, Germany, 20 June 2015. EPA/MAJA HITIJ
Topics: 10sballs_com, Atp World Tour, Gerry Weber Open, Grass tennis, Halle, Ivo Karlovic, Rf, Roger Federer, Sports
-@10sBalls_com / EPA PHOTO GALLERY FROM #HALLE, @rogerfederer INTO FINALS AT THE #GerryWeberOpen- http://t.co/uCjuTMWqrP #tennis #ATPHalle