Jorge Rivera was a guest on Ariel Helwani's The MMA Hour this morning and had some unfortunate news - his opponent Alessio Sakara was out of their UFC 133 fight. MMA Fighting reporter Mike Chiappetta quickly followed up with a tweet verifying the info. Here's what he had to say:

Alessio Sakara has torn his ACL and is out of the Jorge Rivera fight at UFC 133. UFC searching for a replacement. #UFC Mike Chiappetta MMA

MikeChiappetta

Right after this, Rivera mentioned on The MMA Hour that he might be fighting Constantinos Philippou, who is currently scheduled to face Rafael Natal at the event. However, nothing has been confirmed as of yet. All we know right now is that UFC 133 has suffered yet another injury, and it seems like a Rivera/Sakara fight is never going to happen. The two were scheduled to meet at UFC 118, but Rivera withdrew because of an injury. It was rescheduled for UFC 122, but Sakara bowed out with a flu-like illness right before the weigh-ins.

Bloody Elbow will keep you updated on any official replacement that is inserted into a fight with Rivera.

UPDATE - Chippetta just tweeted that Philippou has been confirmed as Rivera's opponent. We will have to wait and see what happens to Philippou's original opponent Rafael "Sapo" Natal.