Seeds • Rankings are as of October 1, 2012
Other entrants The following players received wildcards into the singles main draw: •
Lleyton Hewitt •
Li Zhe •
Wu Di •
Zhang Ze The following players received entry from the qualifying draw: •
Brian Baker •
Michael Berrer •
Alex Bogomolov Jr. •
Łukasz Kubot •
Lu Yen-hsun •
Marinko Matosevic •
Philipp Petzschner Withdrawals •
Julien Benneteau → replaced by
Grigor Dimitrov •
Juan Martín del Potro (left wrist injury) → replaced by
Go Soeda •
David Ferrer (stomach virus) → replaced by
Tommy Robredo •
Mardy Fish (health issues) → replaced by
Alejandro Falla •
Marcel Granollers → replaced by
Ryan Harrison •
Gaël Monfils → replaced by
Albert Ramos Viñolas •
Rafael Nadal (left knee injury) → replaced by
Martin Kližan •
Andy Roddick (retired from tennis) → replaced by
Benoît Paire Retirements •
Florian Mayer (rib injury) ==Doubles main-draw entrants==