Rashad Evans and 
Chael Sonnen have booked their spots on the UFC's 20th anniversary weekend.
 On Wednesday, the much-rumored bout between Evans, the former UFC  light heavyweight champion, and Sonnen, the perennial two-division  contender, which will be held at 
UFC 167 on Nov. 16 in Las Vegas, was announced. The news was broken on the UFC Fight Night pre-game show on FOX Sports 1.
 While not yet called such, the fight is expected to be the co-main  event, underneath the welterweight title fight between champion Georges  St-Pierre and challenger 
Johny Hendricks.
 The bout will be contested at light heavyweight.
 Sonnen (29-13-1) carries the momentum of his first-round light  heavyweight submission of Mauricio "Shogun" Rua into the bout. Coming  off back-to-back losses to 
Jon Jones and 
Anderson Silva,  Sonnen had talked about returning to middleweight prior to defeating  Rua on Aug. 17, but the Evans fight means he's hanging around at 205 at  least a little longer.
 Evans (18-3-1), too, is looking to rebuild momentum. After looking listless in a 
UFC 156 loss to 
Antonio Rogerio Nogueira, the former champ scored a split-decision win over 
Dan Henderson at 
UFC 161.