Roger Federer bemoaned a code violation handed by umpire Damian Steiner after the six-time ATP Finals champion suffered a surprise defeat to Kei Nishikori at London’s O2 Arena.
Roger Federer bemoaned a code violation handed by umpire Damian Steiner after the six-time ATP Finals champion suffered a surprise defeat to Kei Nishikori at London’s O2 Arena.