WWE Champion CM Punk has been working through a knee injury. He had some fun on Twitter on Monday when he Tweeted he had a scoop for the dirt sheets in that he was undergoing x-rays.

It's not believed to be anything serious as Punk is booked for WWE TLC and obviously worked this week's WWE Raw.

9:04 PM EST Update: The x-rays had nothing to do with his hurt knee as Punk Tweeted the following: