Dubai: Australian Open champion Serena Williams has pulled out of this week`s Dubai Tennis Championships, organizers said on Saturday.
Officials released a brief message on Twitter saying Williams and Canada`s Genie Bouchard had withdrawn from the lucrative WTA event.
Williams recently won her sixth Australian Open title but the world number one sat out last week`s Fed Cup tie for the United States because of a persistent, nagging cough.
No reason was given for Bouchard`s withdrawal, after she was awarded a wild card in the event.
Venus Williams won the title last year and will be defending her crown at Feb. 15-21 tournament.