John Cena's WWE career as a performer comes to an end tonight in Washington. Meanwhile, his first-ever opponent on television, Kurt Angle, penned a heartfelt message ahead of Saturday Night's Main Event.The term 'Ruthless Aggression' became a highlight of John Cena's career when he appeared in front of a live crowd and slapped Kurt Angle. While he lost the match, Cena and Angle have crossed paths on several occasions in the Stamford-based promotion.Moreover, the Olympic Gold Medalist was John Cena's first-ever opponent in front of an audience on WWE SmackDown. Today, Angle penned a heartfelt message to The Franchise Player ahead of his final-ever match in the company as a performer against Gunther."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.Angle also welcomed his former rival to wrestling retirement."As he embarks on his well-deserved retirement, I wish him all the best in the next chapter of his life. Enjoy your last ride, John....a legend forever. Welcome to retirement, my friend," Angle tweeted on X.John Cena's father wanted WWE Hall of Famer as his son's last-ever opponentJohn Cena's first-ever segment with Kurt Angle became an iconic moment in the promotion's history, and the two stars have mainly seen success as performers in the company. In 2019, the Olympic Gold Medalist wanted to retire at WrestleMania in a match against John Cena, but that didn't happen.Since Angle's retirement, the WWE legend has not stepped into the ring, but John Cena Sr. would have liked to see him face his son. Speaking on the All Axxess podcast, the veteran stated he would've liked to see his son's career close at WrestleMania in a match against his first-ever opponent. Moreover, he agreed that Cena should've been Angle's last opponent instead of Baron Corbin.