John Cena has been part of some incredible rivalries in his legendary career in WWE. One among them was with the late Umaga.The two feuded on and off between 2006 and 2008, and faced each other several times in singles and tag team matches. However, their Last Man Standing match from Royal Rumble 2007 showcased a different level of violence than is normally associated with The Franchise Player.Responding to a fan who had posted a clip of Cena choking out Umaga with the ring ropes at Royal Rumble 2007, former WWE referee Mike Chioda revealed that Cena allegedly choked his rival out as part of a shoot (a real, unscripted event in wrestling):"That’s because he choked Umaga out for a shoot!"Mike Chioda @MjcChiodaLINKThat’s because he choked umaga out for a shoot! 😳🤣Cena had defended the WWE Title against Umaga at New Year's Revolution 2007, a month before the Royal Rumble. He then defeated the Samoan in under 24 minutes at the Rumble in what was a gruesome match.John Cena's last match is set to be held in just over a monthWWE recently announced four first-round matches for the 16-man Last Time is Now Tournament. The winner will go on to face John Cena in his retirement match at Saturday Night's Main Event on December 13, in Washington, DC.On RAW, Sheamus will battle Shinsuke Nakamura, while Rusev will face Damian Priest. WWE also announced two first-round matches on the November 7 edition of SmackDown.One of them will see Jey Uso go up against The Miz, while LA Knight will face a mystery competitor. Some fans have guessed that we might see SmackDown General Manager Nick Aldis step into the ring against Knight. Others have predicted a star from outside WWE, such as Joe Hendry.It remains to be seen which superstar ends up being Cena's final opponent.