Roger Federer was able to defend his title with a two-set win over Kei Nishikori . He won the title in his hometown for the fifth time after 2006, 2007, 2008 and 2010. Overall, it was the 68th ATP title of his career, but only the second in 2011. Nishikori, who started with a wildcard , had defeated, among others, Tomáš Berdych , who was ranked 4th, and world number one Novak .oković on the way to his second ATP final this season . In doubles in 2010, Bob and Mike Bryan won the title, but they did not defend their title. In this year's final, the top seeded Michaël Llodra and Nenad Zimonjić prevailed in two sets against Max Mirny and Daniel Nestor and thus reciprocated for the defeat in the final three weeks earlier in Shanghai . This was their fourth joint title this season.
The field of participants in the individual competition consisted of 32 players, that of the doubles competition consisted of 16 pairs. The total prize money was EUR 1,308,100, the total financial liabilities were EUR 1,838,100.
The qualification took place on October 29th and 30th, 2011 in the St. Jakobshalle . Four qualifying places were played, which entitle them to participate in the main draw of the tournament.
The following prize money and world ranking points were paid out or credited for reaching the respective round. Players who entered the main field from qualification received the specified qualification points in addition to those for reaching the respective round. Otherwise the amounts are not to be understood as cumulative. The amounts for the double competition apply per team.