Albert Costa was the defending champion, but was defeated in the semifinals by Juan Carlos Ferrero, who ultimately won in the final 6–1, 6–3, 6–2, against Martin Verkerk.
Rafael Nadal was the defending champion, and successfully defended his title in the final 1–6, 6–1, 6–4, 7–6(7–4), against Roger Federer.
Andy Roddick was the defending champion, but lost in the third round to David Ferrer.
James Blake was the defending champion, but lost in the first round to Fabrice Santoro.
Xavier Malisse was the defending champion, but lost in the first round to Bobby Reynolds.
Ivo Karlović was the defending champion, but chose not to participate that year.
Rafael Nadal was the three-time defending champion, but lost in the second round to Juan Carlos Ferrero.
Rafael Nadal was the defending champion, but lost in the third round to Tomáš Berdych.
Wayne Arthurs was the defending champion, but did not participate this year.
Rafael Nadal was the defending champion, but chose not to participate due to a knee injury.
Roger Federer was the defending champion, but he lost in the final against Novak Djokovic 4–6, 6–4, 2–6.
Peter Wessels was the defending champion but lost in the second round to James Blake.
John Millman was the defending champion, but did not participate.
Ivo Karlović won the title, defeating James Blake 6–4, 3–6, 6–4 in the final.
Roger Federer was the defending champion and retained the title, beating Kei Nishikori in the final, 6–1, 6–3. It was Federer's first title in almost ten months but was the first of three that Federer won in succession to end the season.
Thomas Johansson was the defending champion, but lost in the quarterfinals this year.
Olivier Rochus was the defending champion but lost in the semifinals.
David Goffin won the title, defeating Mischa Zverev 6–2, 6–2 in the final.
James Blake was the defending champion.
Sam Querrey won the final after defeating Paolo Lorenzi 6–1, 6–7(3–7), 6–3 in the final.
Colin Fleming and Ross Hutchins were the defending champions, but Hutchins did not participate this year because of illness. Fleming played alongside John Peers, but the team lost to James Blake and Jack Sock in the first round.
Blake and Sock went on to win the title, defeating Max Mirnyi and Horia Tecău in the final, 6–4, 6–4.
Andy Roddick was the defending champion, but he retired from professional tennis in September 2012. Feliciano López won the title beating in the final Gilles Simon, 7–6(7–2), 6–7(5–7), 6–0 for the third title of his career, first since 2010.
James Blake and Jack Sock were the defending champions, but Blake did not participate was due to his retirement from professional tennis. Sock played alongside Ryan Harrison, but lost to Bob and Mike Bryan in the semifinals.
The Bryan brothers went on to win the title, defeating František Čermák and Mikhail Elgin in the final, 6–2, 6–3.
