MANCHESTER, ENGLAND–UFC heavyweight champion Brock Lesnar is seriously ill in hospital after collapsing in Canada, UFC president Dana White said Saturday.

"He's in rough shape, he's in really bad shape," White said Saturday after UFC 105.

"He is not well and he is not getting any better. ... He's very, very sick and he's going to be out for a while. He's got a lot of problems."

Citing mononucleosis, the 32-year-old Lesnar was forced to postpone a title fight against Shane Carwin scheduled for UFC 106 on Nov. 21 in Las Vegas. The fight was pushed back to UFC 108 on Jan. 2, but that too has been postponed.

"He's got mono and he's got something else wrong with him. I know what's wrong with him, he just doesn't want me talking about it," White said. "He doesn't have cancer or AIDS or anything like this, (but) he's got some problems, man."

White said the 6-foot-3, 265-pounder was currently in a hospital and may have to go to the Mayo Clinic or another top facility "to figure out what's wrong with this guy."

"He's not going to be getting well any time soon," he said.

A NATURAL WIN: Randy (The Natural) Couture eked out a close decision over Brandon (The Truth) Vera in a drab light-heavyweight fight at UFC 105.

In the co-main event, English welterweight Dan (The Outlaw) Hardy won a decision over American Mike (Quick) Swick.