At the Gerry Weber Open grass tournament his form continued to go down as he lost to Lucky Loser Dominik Meffert in the first round, 3–6, 5–7. His bad form continued, as he lost to Xavier Malisse in five sets in the first round of Wimbledon. He was now 9 wins–8 losses since his good run at the South American clay season. Next stop on his tour was the MercedesCup, losing to Albert Montañés for the first time in six meetings in the semifinals, 3–6, 6–7(6–8), despite having two set points in the second set tiebreak. At the German Open, Ferrero defeated Jan Hájek and Jarkko Nieminen, before being upset by Florian Mayer, 7–6(7–3), 2–6, 3–6, for the first time in five meetings. At the Umag Open, Ferrero won his third title of the year, at first struggling against Pablo Cuevas, 4–6, 6–4, 6–4, but cruising through against Alexandr Dolgopolov, Andreas Seppi, and Potito Starace in the final. He then missed the Rogers Cup and Cincinnati Masters due to a knee injury. He returned at the US Open, where he defeated Martin Kližan and Ricardo Mello in straight sets, but lost to Jürgen Melzer 5–7, 3–6, 1–6 in the third round. He missed the rest of the season due to knee and wrist injuries for which he was operated in October.