A very unlikely event occurred at the Volta a Portugal on Tuesday when the non-contact sport of cycling resembled none other than a boxing match when two cyclists began to fight.

Professional cyclists are usually mild mannered folk and this kind of brutality on the road is something that is never associated with the sport.

Something clearly set off the two man after a disagreement and it didn't take long before hand gesturing and foul language wasn't enough for the pair, who began engaging in hand to hand combat.

As you can plainly see, rider rage is definitely a real phenomenon, viewers watching the sixth stage of the Volta a Portugal were shocked to see two cyclists fighting in the road and having to be torn apart by fellow competitors.

The video was spotted of Italian rider Enrico Rossi and Spanish rider Vicente de Mateus mixing it up in the middle of the road after what had evidently been a crash between the two.

The mix up clearly wasn't to be settled easily as after quickly exchanging words, the riders began to throw punches at each other before the scuffle is broken up by other racers stepping in.

After the race had finished, Rossi then explained to Danish television channel TV2  that de Mateus failed to check where he was riding before colliding with the Italian, provoking the hot blooded reaction.

Rossi explained: "I was going over the line and then he ran into me, so we overturned, then he stood and shouted at me so I hit him.”

Very unusual series of events in a sport where you don't expect to see competitors getting overly physical with each other.

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