2011 Erste Bank Open – Singles
Jürgen Melzer was the two-time defending champion, but lost to Kevin Anderson in the quarterfinals.
No.1 seed Jo-Wilfried Tsonga won the tournament beating No. 2 seed Juan Martín del Potro in the final, 6–7, 6–3, 6–4.
This tournament marked the final professional appearance of former world No. 1 and 1995 French Open champion Thomas Muster.