Roger Federer loses to Tomas Berdych at Sony Ericsson Open fourth round in Miami . ( CNN ) -- Federer will play Jo-Wilfried Tsonga of France on Saturday. Venus Williams beats Agnieszka Radwanska to advance to women 's semifinals .
Roger Federer loses to Tomas Berdych at Sony Ericsson Open fourth round in Miami . Federer will play Jo-Wilfried Tsonga of France on Saturday. Venus Williams beats Agnieszka Radwanska to advance to women 's semifinals .