Francis Ngannou and Manchester United goalkeeper Andre Onana had a fun interaction at Old Trafford this past weekend.

What happens when a world heavyweight MMA champion takes on a world-class goalkeeper in a fight? It's a question that doesn't really need an answer, and luckily, Francis Ngannou was just play fighting with Manchester United's André Onana.

The footage went viral when video emerged from a Manchester United fan account that seemed to show the pair get into a grappling match. Ngannou, who stands at 6’4″ just weighed in at 256lb for his MMA comeback, took down 6’3″ Onana and moved him around with ease.

Francis Ngannou humorously responds to Manchester United's Andre Onana, who jokingly requests a rematch after takedown.

Video footage shows Francis Ngannou spar Manchester United star Andre Onana after the UEFA Europa League game against Bodo/Glimt on Thursday at Old Trafford, in Manchester. It was one of Ngannou's first public outings since his thrilling return to mixed martial arts,

Andre Onana met UFC star Francis Ngannou on the Old Trafford pitch after Manchester United's Europa League win over Bodo/Glimt, with the duo then going head-to-head in a quick fight