WWE Saturday Night's Main Event is to showcase John Cena's final ever match in the promotion. Meanwhile, The Miz poked fun at his former rival's latest accomplishment on his way out.In 2009, The Miz had his first on-screen rivalry with John Cena, and it evolved in the coming years under the old regime. The two have had a legendary feud in the promotion and met each other inside the squared circle twice at The Grandest Stage of Them All.Today, John Cena is set to retire from in-ring competition following his match against Gunther. Recently, The Miz tweeted a video on X/Twitter and poked fun at John Cena's recent milestone as the Men's Grand Slam Champion, as The A-Lister is a two-time Men's Grand Slam Champion in the promotion."If the “Greatest of all time” only has 1 and I have 2, does that make me…," The Miz tweeted on X.John Cena's legendary rival sends a message ahead of WWE Saturday Night's Main EventJohn Cena's illustrious career started in the Stamford-based promotion when he answered Kurt Angle's open challenge on an episode of WWE SmackDown. The two crossed paths on multiple occasions, and Angle wanted Cena to be his final opponent at WrestleMania 35.However, it didn't happen at the time. Today, the Olympic Gold Medalist penned a heartfelt message to his longtime rival ahead of his final-ever match in the company against Gunther. Moreover, he welcomed the 17-time WWE World Champion into the world of retirement."Who in the hell are you? I'm John Cena. From his unforgettable moments in the ring to his inspiring presence outside of it, John Cena has truly left an indelible mark on the world of sports entertainment. I am proud to have been part of his journey, and what a ride it has been for him. His dedication, resilience, and passion have inspired countless fans and peers alike," Angle tweeted on X.It'll be interesting to see how The Leader of the Cenation ends his final match.