A video has emerged of a sparring session between former world champion Fernando Vargas’ son and another young man behind closed doors in a boxing gym.

Sparring at a young age always has to be monitored carefully in that two fighters are matched relatively evenly, where possible, so that one is not outclassed and injury risked.

The following video is coming in for a lot of heat at the moment that shows Vargas failing to stop the spar and allowing one young man to get knocked out:

Leading professional fighters, among fans, were not impressed with Fernando Vargas for not stepping in: