Serena decides to return to competitive tennis at this tournament . Meanwhile , top seed Roger Federer has pulled out of this week 's grass court tournament in Halle , Germany . She has been sidelined for nearly a year through injury and illness . Serena 's sister Venus also returns to compete in same tournament . Roger Federer pulls out of grass court tournament in Halle .
Serena decides to return to competitive tennis at this tournament . She has been sidelined for nearly a year through injury and illness . Serena 's sister Venus also returns to compete in same tournament . Roger Federer pulls out of grass court tournament in Halle .