Boxer brings his son to weigh in, son punches opponent square in the nuts

Vids 18/09/2017

British boxer Billy Joe Saunders and American Willie Monroe Jr are due to fight in London this weekend. 

Saunders' brought his son along for the weigh-in and everyone in the crowd thought it was pretty cute when the kid stood on the scales and had a glance down at what he weighed in at.

And then - out of nowhere - POW! He lands a punch right in Monroe Jr's ballbag.