9 Nov 2008

Serena Williams and Ivanovic withdraw from WTA champs

9:17 am on 9 November 2008

The US Open tennis champion Serena Williams and French Open champion Ana Ivanovic have withdrawn from the WTA Championships in Doha.

Williams blames a sore stomach muscle while Ivanovic is suffering from a virus.

After beating Dinara Safina and losing to sister Venus, Williams needed to defeat Olympic gold medallist Elena Dementieva to qualify for the semi-finals.

Spectators were not left without matches, as Williams was replaced by Russian Nadia Petrova and Poland's Agnieszka Radwanska replaced Ivanovic.