Former UFC light heavyweight champion Rashad Evans has suffered a leg injury and is out of the UFC 170 co-main event against Daniel Cormier.

Evans’ injury will not require surgery, but will require at least four weeks of rehabilitation.

With Evans’ withdrawal just over a week before the Feb. 22 event in Las Vegas, the promotion has scrapped the bout altogether rather than seek a last-minute replacement to battle Cormier. The event will proceed with 10 bouts, including the headlining women’s bantamweight title tilt between champion Ronda Rousey and unbeaten Sara McMann.

Evans was seeking his third straight win to climb back into the 205-pound title picture. After falling short against champion Jon Jones at UFC 145, Evans suffered the first, two-fight losing streak of his career in early 2013. However, he bounced back with two straight wins over former UFC title challengers Dan Henderson and Chael Sonnen to close out the year.

Cormier, meanwhile, will have his light heavyweight debut pushed back. The former Olympic wrestler carries an unblemished record of 13-0 while competing at heavyweight. The former Strikeforce Heavyweight Grand Prix champion has bested Frank Mir and Roy Nelson in his two Octagon appearances.

UFC 170 takes place from the Mandalay Bay Events Center and airs live on pay-per-view. The preliminary card will be split between four fights on Fox Sports 1 and a lone bout on the promotion’s digital network, Fight Pass.