Roger Federer withdraws from Madrid Open

Roger Federer will not play in this week's Madrid Open due to a back injury.

Federer suffered the injury during practice over the weekend and is withdrawing as a precaution. He missed three months earlier this year after undergoing knee surgery following the Australian Open.

Federer is another high-profile name to drop out of the Madrid tournament. On Friday, Serena Williams announced that she would not play in the tournament because of illness.

Information from the Press Association contributed to this report.