The two Mexican clubs went head-to-head for the match organised as a fundraiser for the United Soccer Talents foundation in California.
The exhibition was meant to be a bit of harmless fun, with club legends making appearances for both teams.
But tensions boiled over and a mass brawl suspended the match after fighting fans poured onto the pitch at half-time, with Club America leading 2-1 at the time.
Around 50 people were involved in the scrap, which led to one man being knocked unconscious and another five arrested.
Ah, the spirit of pre-season.
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