John Cena suffers potential knee injury on WWE Raw last night (Nov. 19) in Dayton

During last night's (Nov. 19, 2012) episode of WWE Monday Night Raw, John Cena appeared to roll his ankle while chasing after Dolph Ziggler during a segment on the show. It's hard to tell if it was a spot that was planned or if Cena legitimately just pushed off his ankle wrong after climbing out of the ring while trying to run down Ziggler.

You can see the incident at 4:00 in the video below:

It seems legit, and he really sells that there's a problem by favoring his right leg while heading up the ramp. Then, WWE played up the potential of a knee injury, showing Cena getting wrapped up while openly speculating that he had a potentially torn meniscus.

On top of that, they ran another angle with Cena grabbing AJ Lee while she was attacking Ziggler only to have Dolph attack him and send him through a couple of poorly constructed bathroom stalls. It was then that they really sold Cena being hurt, even having Josh Matthews give an update backstage.

This could have been done on the fly because WWE wanted to make sure they set themselves up in the event that Cena is really injured but it's pretty convenient in either case.

For his part, Cena played up the possibility of injury on his Twitter account after the show:

"I am headed to grand rapids right now for early morn MRI on left knee. @WWE no matter what the result, I will be in the ring tomorrow!"

Cena is scheduled to appear at the SmackDown tapings because ticket sales have been sagging and he's generally been used for dark matches to help sell the show. That makes it a lot easier to explain away his absence in the event that he's genuinely hurt and can't go.

But of course we have to suspect it's all a work and he's not really hurt. Stay tuned and we'll keep you up to date on any news that comes out, legitimate or storyline.