UFC 143 Fight Card: Amir Sadollah Out, Matt Riddle In Against Jorge Lopez

The injury bug has struck UFC 143 once again.

Announced Tuesday, "The Ultimate Fighter 7" winner Amir Sadollah (5-3) has been scratched from a scheduled bout against Jorge Lopez (11-2) for the February 4th event. Fellow TUF 7 alum Matt Riddle (5-3) has been tapped as a replacement opponent. UFC officials confirmed the switch via Twitter.

Riddle was previously slated to meet Luis Ramos on the undercard of UFC 141, however a fight night illness led to the bout's cancellation. Prior to the setback, the 25-year-old fell short in two straight decisions to Sean Pierson and Lance Benoist.

Lopez, meanwhile, heads into his second UFC contest after dropping a unanimous decision to Justin Edwards in his September debut. The loss snapped a ten-fight win streak that stretched back to 2008.

UFC 143 takes place on Super Bowl weekend at the Mandalay Bay Events Centers in Las Vegas, Nevada. An interim welterweight title bout between Nick Diaz and Carlos Condit is the night's main event.

UFC 143 fight card:

Interim Welterweight Championship: Nick Diaz vs. Carlos Condit
Heavyweight: Roy Nelson vs. Fabricio Werdum
Bantamweight: Scott Jorgensen vs. Renan Barao
Welterweight: Josh Koscheck vs. Mike Pierce
Featherweight: Dustin Poirier vs. TBA
Bantamweight: Alex Caceres vs. Edwin Figueroa
Welterweight: Jorge Lopez vs. Matt Riddle
Middleweight: Ed Herman vs. Clifford Starks
Welterweight: Matt Brown vs. Chris Cope
Welterweight: Justin Edwards vs. Mike Stumpf
Middleweight: Rafael Natal vs. Michael Kuiper