7-year-old K.J. is battling kidney disease and the Make-a-Wish foundation granted his wish to meet his favourite wrestlers in person.
Cena is one of the foundation's biggest contributors and has consistently taken part in similar events over the years.
Shock incident sees India's Dahiya bitten on arm by rival during wrestling semi-final
The United States champion gave K.J. a signed title belt, introduced him to other wrestlers and even played some video games with him.
"I cried just seeing him go through this. Such an experience, because in the beginning, I was scared I would lose him," said KJ's mother.
Well played John Cena, well played indeed.
Shocking footage reveals full-jawed bite on arm in wrestling medal bout
Tokyo 2020 - ROC vs Uzbekistan - Wrestling Men's Freestyle 74kg - 1/4F - Olympic Highlights