Published: Oct 10, 2012 6:32 AM EDT
Updated: Oct 11, 2012 6:32 AM EDT

SHANGHAI (AP) - U.S. Open champion Andy Murray received a walkover into the third round at the Shanghai Masters on Wednesday following the withdrawal of Florian Mayer of Germany because of a rib injury.

The Briton will play either 15th-seeded Gilles Simon of France or Alexandr Dolgopolov of Ukraine.

Murray is the two-time defending champion at the tournament with a 9-0 record after winning finals against David Ferrer last year and Roger Federer in 2010.

The third-ranked Murray also won the Olympic gold medal at the London Games and a title in Brisbane this year.