Anthony Pettis captured the UFC lightweight title on Saturday night in his hometown of Milwaukee, Wisconsin with a submission victory over Benson Henderson but he did suffer a knee injury in the fight. 
Pettis injured his left knee after he checked a kick during his fight with Henderson and the extent of the injury is unknown at this time.
“Henderson threw a kick and I went to check with my left leg and he hit right in the crook of the knee so it was like I felt it go back and forth,” Pettis said during the UFC 164 Post Fight Press Conference. “I don’t know what happened yet. I stepped on it, it was hurting a little bit so when he had me against the cage I was going with one leg cause it was starting to lock up. I’m not sure what happened yet, we’ll find out pretty soon. I’ll get an MRI, see what happens.”
The injury is to his left knee and this is not the same knee he injured earlier this year before a potential bout with featherweight champion Jose Aldo. Once he gets the MRI done, it will be determined how long he will be out of action and when he will be able to make his first title defense.