Nicolás Almagro was the defending champion, but lost in the quarterfinals to Frederico Gil.
Gilles Simon was the defending champion, but chose not to participate that year.
Albert Montañés won in the final 7–6(7–2), 7–6(8–6), against Juan Mónaco.
Juan Balcells was the defending champion but lost in the quarterfinals to Albert Montañés.
Jérémy Chardy was the defending champion; however, he lost to Daniel Gimeno-Traver in the first round.
Albert Montañés became the new champion, after his victory against Gaël Monfils in the final. Monfils retired during the second set.
Fabio Fognini chose to not defend his 2009 title.
Alberto Martín defeated Carlos Berlocq 6–3, 6–3 in the final.
Albert Montañés was the defending champion, but was defeated 1–6, 3–6 by Juan Ignacio Chela in the semifinals.
Chela went on to win the tournament, defeating qualifier Pablo Andújar 7–5, 6–1 in the final.
Nicolás Almagro defended his title by defeating Filippo Volandri 6–3, 4–6, 6–4 in the final.
Juan Martín del Potro defended the title by winning 6–4, 6–2 against Richard Gasquet.
Julian Reister was the defending champion.
Daniel Gimeno-Traver won the final after defeating Albert Montañés 6–2, 4–6, 6–4 in the final.
Rafael Nadal was the eight-time defending champion, but was defeated in the final by Novak Djokovic 2–6, 6–7(1–7), bringing an end to Nadal's 46-match winning streak at the event. As a result, Djokovic became the first man ever to win singles titles at 8 of the 9 Masters 1000 series tournaments.
Albert Montañés is the defending champion but lost in the first round to Gianluca Naso.
Dustin Brown defeated Filippo Volandri 7–6(7–5), 6–3
Marcel Granollers was the defending champion, but lost in the quarterfinals to Dominic Thiem.
David Goffin won the title, defeating Thiem in the final, 4–6, 6–1, 6–3.
Adrian Ungur took the title, beating qualifier Antonio Veić 6–1, 6–0
Albert Montañés won the title, beating Potito Starace 6–2, 6–4
Alejandro Falla was the defending champion, but lost in the quarterfinals to Jordi Samper-Montaña.
Leonardo Mayer was the defending champion, but chose not to participate this year.
Andy Murray was the defending champion, but chose not to participate this year.
Rafael Nadal was the defending champion, but lost to Dominic Thiem in the semifinals.
David Ferrer was the defending champion, but lost in the quarterfinals to Dominic Thiem.
Taro Daniel was the defending champion but failed to defend his title, losing to Thiago Monteiro in the second round.
