Soccer referees do not generally get the better of their opponents during fights. This can be chalked up to referees rarely fighting, preferring to try to calm a situation down even when sucked into a violent confrontation.
This referee in Argentina, though, is a bad ass mother who don't take nothing off of nobody. He red cards a player, who takes offense and starts swinging. The referee coolly ducks then squares up and hits back.
(the fight starts just after the 5:00 mark)