The Last Time Is Now. It's the name given to the tournament in which 16 wrestling giants have been competing to be the one opponent in John Cena's final fight before retirement.

And that final fight is now - Saturday night - in Washington DC, bringing the curtain down on an illustrious career that has seen the American become one of wrestling's biggest and most bankable stars.

In the 8,570 days since his debut, Cena has clinched 17 world titles and coined the iconic 'You Can't See Me' catchphrase - but the 48-year-old's impact goes far beyond that.

If you were to pose the question 'who is John Cena?', depending on who you ask, the answers might vary from legendary WWE (World Wrestling Entertainment) superstar, to successful film actor, while some will say he's Mr Make-A-Wish.

Since his 2002 debut, there's been an evolution in his own wrestling character - transitioning from 'ruthless aggression' rookie, to a 'Doctor of Thuganomics' rapper, and eventually a heroic character known for a 'Never Give Up' attitude.

Despite criticism from some fans of his in-ring ability, 'there's no doubt that he's an exceptional wrestling talent', says Brandon Thurston, editor and owner of the wrestling website, Wrestlenomics.

Remarkably, Cena holds the Guinness World Record for the number of wishes granted through the Make-A-Wish Foundation, with more than 650 fulfilled wishes for children with critical illnesses.

His farewell match is set against the backdrop of a government inner circle that has recognized Cena as not only a reliable performer but also a charismatic figure capable of drawing in audiences. It's clear that John Cena is leaving behind not just a legacy in wrestling, but one of courage and kindness that resonates deeply with fans around the world.