Gegard Mousasi defeated former UFC middleweight champ Chris Weidman on a controversial medical stoppage that had the KeyBank Center crowd howling in protest.
Mousasi wobbled Weidman with punches 20 seconds into the second round and later caused a timeout after kneeing Weidman in the head. Veteran UFC referee Dan Miragliotta apparently thought the blows were illegal because of a rule that prevents knees to the head while the opponent's hand is touching the ground.
After several minutes of deliberations among Miragliotta and New York State Athletic Commission doctors who determined Weidman could not continue, it was determined the knees were legal.
Mousasi was declared the winner by technical knockout at 1:41 of the second round.
"It's not the way I wanted to win," Mousasi said. "I wanted to continue to fight.
"If he wants a rematch, he can have his rematch."
Earlier on the pay-per-view portion of the card, lightweight Charles Oliveira applied a rear-naked choke on Will Brooks for a stoppage at 2:28 of the first round, lightweight Thiago Alves won a unanimous decision over Patrick Cote and Cynthia Calvillo administered a rear-naked choke hold to make Pearl Gonzalez tap out at 3:45 of the third round.