Former WWE superstar Phil 'CM Punk' Brooks will be on trial on May 21, in a defamation case brought on by WWE doctor, Chris Amann.

Amann is suing Punk as well as fellow wrestler Colt Cabana, for comments made by the two on Cabana's 'Art of Wrestling' podcast in November 2014. 

During the episode, Punk alleged that Amann encouraged the former WWE champion to work a European tour with a concussion, and allegedly misdiagnosed an MRSA infection. 

Punk also claims that Amann has repeatedly placed the interests of the WE over the medical interests of superstars. 

Amann is suing for defamation, which is defined as lowering someone in the eyes of right-thinking members of society and/or disparage that person in their trade. 

Punk and Cabana initially attempted to have the lawsuit dismissed, but this motion was turned down by the presiding judge. 

WWE have issued the following statement:

"Phil Brooks' latest claim that WWE directed Dr. Amann to file a lawsuit against Brooks is categorically false. Dr. Amann made the decision to file suit in order to protect his professional reputation. WWE conducted its own investigation into this matter and found no evidence of wrongdoing by Dr. Amann, and thus continues to support Dr. Amann and the staff that runs our world-class medical program."

Punk is scheduled to have his second UFC match against Mike Jackson at UFC 225 on June 9.