Isaac Johnson had been competing at the Matador Fighter Challenge at Cicero Stadium on Friday November 22 when he collapsed and was rushed to hospital at around 8:38pm

MMA fighter Isaac Johnson has tragically died at 31 years old, hours after collapsing during a fight in Chicago.

Isaac had been competing at the Matador Fighter Challenge at Cicero Stadium and was rushed to hospital at around 8:38pm on Friday,November 22, according to NBC Chicago . Sadly, despite best efforts he was pronounced dead at 12:01am, the report adds, with police now conducting a death investigation and an autopsy scheduled.

The event was being sold as “the ultimate MMA and Thai event, where local warriors will battle it out in high-stakes, high-intensity matches.”

Taking to Facebook Joe Goyita, the event's

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