UPDATE: It isn’t confirmed if this is the spot, but the following video has surfaced from last night’s house show which could have been where Cena got injured:
https://twitter.com/c_hawk1994/status/640000490013650944
ORIGINAL: John Cena may have been injured during a live event in Hampton, Virginia. He was in a street fight with Kevin Owens when he went down, the match stopped and the referee threw up an “X” symbol. According to the source, it appeared that Cena was having problems with either his nose or his neck. His nose, of course, was recently broken by Seth Rollins during a match on RAW. Trainers came out but Cena wrestled for another six minutes and went through a table to win the match. After it was over, several WWE officials came out with the trainers and they checked out his nose and neck area for around five minutes. Cena looked to be in pain as he went straight to the backstage area before stopping to point to the crowd.