See main article: 2009 Barcelona Open Banco Sabadell.
Four-time defending champion Rafael Nadal successfully defended his title, defeating David Ferrer in a rematch of the previous year's final, 6 - 2, 7 - 5, to win the singles title at the 2009 Barcelona Open. It was his record-extending fifth title at the Barcelona Open.
The top eight seeds receive a bye into the second round.