Swiss Open champion Roger Federer dramatically withdraws from Paris . German world No . two is `` overwhelmed and exhausted '' after his triumph in Paris . Federer traditionally uses Swiss follow-up event as warm-up for Wimbledon .
French Open champion Roger Federer dramatically withdraws from Halle Open . Swiss world No . 2 is `` overwhelmed and exhausted '' after his triumph in Paris . Federer traditionally uses German follow-up event as warm-up for Wimbledon .