The 2011 SAP Open was a tennis tournament played on indoor hard courts. It was the 123rd edition of the SAP Open, and was part of the ATP World Tour 250 series of the 2011 ATP World Tour. It took place at the HP Pavilion in San Jose, California, United States, from February 7 through February 13, 2011.

On the opening night of the event, Gaël Monfils defeated Pete Sampras 7–6(4), 6–4 in an exhibition match. Gaël Monfils was forced to withdraw with a left wrist injury prior to his semifinal match against Milos Raonic.^[3] Following Monfils' withdrawal, Raonic played an exhibition match against Ivo Karlović, who won the match 7–6(3), 7–6(7). Unseeded Raonic eventually faced Fernando Verdasco in the final, and went on to win his first ATP World Tour career title.

• ¹ Rankings as of January 31, 2011.

The following players received wildcards into the main draw:

• 👁 United States
  Bradley Klahn
• 👁 United States
  Rajeev Ram
• 👁 United States
  Tim Smyczek

The following players received entry from the qualifying draw:

• 👁 Moldova
  Roman Borvanov
• 👁 Colombia
  Robert Farah
• 👁 United States
  Alex Kuznetsov
• 👁 United States
  Jesse Levine

👁 Canada
Milos Raonic defeated 👁 Spain
Fernando Verdasco, 7–6^(8–6), 7–6^(7–5).

• It was Raonic's first career title. He was the first Canadian to win a title since Greg Rusedski won Seoul in 1995.

👁 United States
Scott Lipsky / 👁 United States
Rajeev Ram defeated 👁 Colombia
Alejandro Falla / 👁 Belgium
Xavier Malisse, 6–4, 4–6, [10–8].

• Official website