The Ultimate Fighting Championship on Saturday announced that UFC 163 would take place on Aug. 3 in Rio de Janerio, Brazil.
The announcement came from UFC executive Marshall Zelaznik during the UFC on FX 8: Belfort vs. Rockhold post-fight press conference.
Pettis (16-2) is dropping down from the lightweight division where he was the top contender in order to face the Brazilian champion.
Koscheck (17-7) is coming off back-to-back losses and hopes to rebound. Maia (18-4) is riding a three-fight winning streak that includes a win over Kosheck’s long-time training partner Jon Fitch in his last outing.
UFC 163 will be the fourth time Brazil will host a UFC event in 2013.