The defending champion in the singles was Philipp Kohlschreiber , who was eliminated in the semifinals against his compatriot Tommy Haas . This was able to prevail in the final and win his second title in Halle with a victory over record title holder Roger Federer . In doubles, Rohan Bopanna and Aisam-ul-Haq Qureshi no longer competed together to defend their title. While Bopanna did not take part in the tournament, Qureshi reached the final again with Jean-Julien Rojer , where they defeated Treat Conrad Huey and Scott Lipsky .
The field of participants in the single competition consisted of 28 players, that of the doubles competition consisted of 16 pairs. In the singles, the four top seeded players received a bye in the first round.
The qualification took place from June 9th to 11th, 2012. Four qualifying places were played, which entitle them to participate in the main draw of the tournament.