by Damon Martin – MMAWeekly.com
The upcoming UFC 90 card in Chicago has undergone yet another change. MMAWeekly.com has confirmed that Diego Sanchez has been forced out of his upcoming bout against Thiago Alves due to an undisclosed injury.

Josh Koscheck has appeared as the most likely candidate to step in on short notice to face Alves, although at this point it is still preliminary as no bout agreements have been signed yet.

The fight between Alves and Sanchez was thought to be a No. 1 contenders match for the next shot at the UFC welterweight title currently held by Georges St. Pierre. If Koscheck does accept the fight, the bout would probably carry the same type of stipulation.

Koscheck was in early preparation for a December date against Japanese judoka Yoshiyuki Yoshida, as the main event for the UFC Fight for the Troops show, but the Alves fight carries a huge significance to the 170-pound title picture.

Alves has been on an incredible run of late pulling off stoppages over two Top 10 opponents in his last pair of fights, defeating Matt Hughes and Karo Parisyan.

If the fight between Alves and Koscheck becomes a reality, the match-up would still be on the main card for the pay-per-view featuring a middleweight title fight between Anderson Silva and Patrick Cote.

Stay tuned to MMAWeekly.com as more details on this story become available.