Dmitry Tursunov was the defending champion, but lost in the first round to Richard Gasquet.
Kei Nishikori was the defending champion, but chose not to participate this year.
Igor Kunitsyn was the defending champion, but lost to Evgeny Korolev in the first round.
Mikhail Youzhny won in the final 6–7(5–7), 6–0, 6–4 against Janko Tipsarević.
Mark Knowles and Max Mirnyi were the defending champions but they competed with different partners that year, Knowles with Daniel Nestor and Mirnyi with Yevgeny Kafelnikov.
Tommy Robredo was the defending champion, but chose to compete in Marseille instead.
Pablo Cuevas and Marcel Granollers were the defending champions; however, Granollers chose to not compete.
Cuevas partnered up with Michael Russell, but they were eliminated by Jérémy Chardy and Lukáš Dlouhý in the quarterfinal.
Igor Kunitsyn and Dmitry Tursunov, which received wildcards into the doubles draw, won this event. They defeated Janko Tipsarević and Viktor Troicki 7–6(10–8), 6–3 in the final.
Robin Söderling was the defending champion, but decided not to participate this year. Andy Murray, who made his debut appearance at the tournament, beat Alexandr Dolgopolov 6–1, 6–3 to take the title.
Nicolás Almagro defended his title by defeating Filippo Volandri 6–3, 4–6, 6–4 in the final.
David Ferrer won the tournament winning the final against the defending champion Nicolás Almagro by 4–6, 6–3, 6–2.
Juan Carlos Ferrero was the defending champion, but chose to compete in Umag.
Janko Tipsarević won the title against Juan Mónaco after defeating him 6–4, 5–7, 6–3 in the final.
David Ferrer successfully defended his title by defeating Philipp Kohlschreiber in the final, 7–6(7–5), 6–1.
Tomáš Berdych was the defending champion but withdrew because of a wrist injury.
Richard Gasquet won the title, defeating Benoît Paire in an all-French final, 6–2, 6–3.
Jürgen Melzer was the defending champion, but lost in the first round to Igor Sijsling.
Kei Nishikori won the title, defeating Feliciano López in the final, 6–2, 6–3.
Purav Raja and Divij Sharan won the first edition of the tournament, defeating Édouard Roger-Vasselin and Igor Sijsling in the final, 7–6(7–4), 7–6(7–3).
Andy Roddick did not defend his title as he had retired from professional tennis in September 2012.
Matthew Ebden and Ryan Harrison were the defending champions, but Ebden decided not to participate. Harrison played alongside his brother Christian Harrison, but lost in the first round to Ivan Dodig and Marcelo Melo.
Édouard Roger-Vasselin and Igor Sijsling won the title, defeating Colin Fleming and Jonathan Marray in the final, 7–6(8–6), 6–3.
Juan Martín del Potro was the defending champion, but lost to Mikhail Kukushkin in the quarterfinals.
Andy Murray was the defending champion, but chose not to participate this year.
Rohan Bopanna and Pablo Cuevas were the defending champions, but Bopanna chose to compete in Basel and Cuevas chose to compete in Lima instead.
Jean-Julien Rojer and Horia Tecău were the defending champions, but lost in the semifinals to Rajeev Ram and Joe Salisbury.
