
The fight will serve as the main event on a very strong UFC 107 card that is also expected to feature Rampage Jackson vs. Rashad Evans in a battle of Ultimate Fighter coaches, Frank Mir vs. Cheick Kongo in a heavyweight clash, and Thiago Alves vs. Paulo Thiago in a fight between two Top 10 welterweights (and two Brazilians named Thiago).
Sanchez earned the right to fight for the lightweight title by defeating Clay Guida in June, in a fight that the UFC later declared one of the 10 best in the promotion's history. Penn last defended his title in August, when he beat Kenny Florian at UFC 101.