Roger Federer to return to competitive tennis at Halle tournament . Williams has been sidelined for Sunday through injury and illness . Serena Williams 's sister Venus also returns to action in same tournament . Serena Williams pulls out of grass court tournament in Halle .
Serena Williams to return to competitive tennis at Eastbourne tournament . Williams has been sidelined for nearly a year through injury and illness . Serena 's sister Venus also returns to action in same tournament . Roger Federer pulls out of grass court tournament in Halle .