Originally posted on 5thRound.com  |  Last updated 11/29/11

Late Tuesday night, a welterweight bout between Amir Sadollah (Pictured) and Jorge Lopez was added to UFC 143. The event takes place February 4th in Las Vegas, Nevada, most likely inside the Mandalay Bay Events Center.

Sadollah is looking to bounce back from a decision loss to Dunae Ludwig this past August at “UFC on Versus 5.” Prior to the defeat, “The Ultimate Fighter 7″ winner posted impressive back-to-back wins over Peter Sobotta and DaMarques Johnson, respectively.

Lopez made his big league debut in September at “UFC Fight Night 25.” Wanderlei Silva’s protege had his 10-fight winning streak snapped by dropping a unanimous decision to Justin Edwards.

A welterweight title tilt between champ Georges St-Pierre and Nick Diaz headlines the pay-per-view broadcast.

Here is the card’s updated roster:

Rafael Natal vs. Michael Kuiper

Jorge Lopez vs. Amir Sadollah

Alex “Bruce Leeroy” Caceres vs. Edwin Figueroa

Erik Koch vs. Dustin Poirer

Carlos Condit vs. Josh Koscheck

Nick Diaz vs. Georges St-Pierre (UFC Welterweight Champion)

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