The following is provided courtesy of UFC.com:
Scheduled to make his return to the Octagon this June against Chuck Liddell at UFC 85 in London, light heavyweight star Mauricio “Shogun” Rua has instead been forced to withdraw from the bout due to a ruptured ACL in his left knee, the same injury he had surgery on to repair last October after his UFC 76 fight with Forrest Griffin.
Surgery on the injured knee will be scheduled shortly, and there is no word on when Rua will be cleared to return to the Octagon.
One of the game’s top 205-pound fighters, the 26-year old Rua was looking to get back in the win column after his defeat at the hands
of Griffin last year, and his bout with Liddell was just the motivation he needed to train like never before.