A Reddit user has noted the he saw Luke Harper at gym and asked him about his injury which he suffered during the dark match following Monday's WWE Raw. Harper told him that he has a torn ACL. 

The fan posted the following photo:

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As seen in the video captured by a fan below following Monday's WWE Raw, Harper appears to have hurt his right leg while punching Reigns in the corner, before collapsing to the floor.

WWE medics attending to him at ringside before taking him to the back. PWInsider says he was, “screaming and punching the floor in anger.”