The result saw Pirates progress to the semi-finals of the competition at the expense of the Algerian league leaders, following their 1-0 first leg result.

At the final whistle of the second leg, a number of players could be seen kicking and punching each other, while others tried to quiet the disturbance.

Alger's players and staff had reacted angrily to the result and directed their frustrations to both the referee and Pirates.

Physical confrontations erupted between personnel of both clubs.

Riveiro admitted that he didn't see what sparked the melee, but that he hopes never to see that sort of thing again.

He said: "I don't really know what happened," said Riveiro. "Probably we are going to the space to know who started the fight. I think it doesn't matter for me, for us, or for my group; football is something special. It is something that cannot get dirty with this type of behaviour, which is something unacceptable.

"Whatever happened, probably everybody was making mistakes outside, but those behaviours must be as far as possible from these types of spectacles, far from sport because we don't really need it. We have to learn how to win, and we have to learn how to lose, we have to accept the result, whatever is coming."

The Bucs boss added: "And again, I don't really know what happened because I was just sitting on the bench when everything started. I was trying to understand the dimension of what we had just achieved a few seconds before, and all of a sudden, everything was a mess in front of me," he added.

"We will see some sad pictures, and I hope that the people who find themselves in those pictures feel embarrassed enough not to repeat it again, and we can just have a normal football game every time we come to a football game.

“Our fans are a good example all around the world of what a football game means, the way to come to the stadium, enjoying it with a good spirit, and being in a good mood, and that's it. Like I said, I don't want to say much because I don't have all the information right now, but hopefully it is the last time that we see this type of scene in Orlando.”

Jose Riveiro disappointed by CAF violence