Jo-Wilfried Tsonga defeated Juan Martín del Potro in the final, 6–7(5–7), 6–3, 6–4 to win the singles tennis title at the 2011 Vienna Open.
Jürgen Melzer was the two-time defending champion, but lost to Kevin Anderson in the quarterfinals.
This tournament marked the final professional appearance of former world No. 1 and 1995 French Open champion Thomas Muster; he lost in the first round to Dominic Thiem.
Seeds The top four seeds receive a bye into the second round.
Qualifying
Draw
Finals
Top half
Bottom half
External links Main draw Qualifying draw