The Ultimate Fighting Championship makes its Philadelphia debut on Saturday, August 8th for UFC 101: Declaration. In the main event, the two best 155-pound fighters in the world finally meet when UFC lightweight champion BJ Penn looks to defend his crown against number one contender Kenny Florian. Penn has never lost at 155-pounds, and Florian is looking to change that stat this summer.

In the co-feature, the pound-for-pound king of mixed martial arts, middleweight champion Anderson “The Spider” Silva, tests the waters at 205 pounds once again when he battles former light heavyweight champ and Ultimate Fighter season one winner Forrest Griffin. * Lightweight Championship bout: B.J. Penn vs. Kenny Florian * Light Heavyweight bout: Anderson Silva vs. Forrest Griffin * Welterweight bout: Amir Sadollah vs. Johny Hendricks * Middleweight bout: Kendall Grove vs. Ricardo Almeida * Lightweight bout: Josh Neer vs. Kurt Pellegrino

Preliminary card * Lightweight bout: Shane Nelson vs. Aaron Riley * Welterweight bout: Tamdan McCrory vs. John Howard * Middleweight bout: Thales Leites vs. Alessio Sakara * Welterweight bout: Matt Riddle vs. Dan Cramer * Lightweight bout: George Sotiropoulos vs. Rob Emerson * Welterweight bout: Jesse Lennox vs. Danillo Villefort