REVEALED: THE TWO HEALTH TESTS MIKE TYSON STILL HAS TO PASS BEFORE HE CAN ACTUALLY FIGHT JAKE PAUL - AS LEGENDARY BOXER'S RETURN STILL NOT OFFICIALLY SIGNED

• 'Iron Mike' won 44 fights and was undisputed champion from 1987 to 1990 

• He is making a long-awaited comeback against Paul in Texas on Friday night

• But the 58-year-old must now pass more tests after a long battle with his fitness 

Mike Tyson faces a race against time to prove his fitness ahead of a huge comeback fight against Jake Paul, with the legendary boxer required to pass two more health tests ahead of the bout.

'Iron Mike' was the undisputed world heavyweight champion between 1987 and 1990 and terrified opponents with his incredible punching power.

The Brooklyn-born fighter ended his career with a record of 50 wins, including 44 by way of knockout, and six losses, including his disqualification against Evander Holyfield in 1997 for biting his compatriot in the third round.

He is due to make a long-awaited return to the professional boxing fray in his fight against YouTuber-turned-boxer Jake Paul in Arlington, Texas, on Friday, having last taken part in a sanctioned bout in June 2005 against Kevin McBride.

But the event could now be in jeopardy after it emerged that Tyson still has to pass a brain test (EEG) and a heart test (EKG) this week in a safety precaution agreed to months ago, Boxing Kingdom reports.

The Texas Department of Licensing and Regulation mandated the tests ahead of the bout, which pits boxers with a 31-year age gap. 

Indeed, when Paul was born, Tyson had already won 45 fights and won and regained two heavyweight belts.

The fight was originally supposed to take place in July but a stomach alcer flare-up while on a plane meant that the 58-year-old was advised to delay the contest.

At the time, Tyson said: 'I asked the doctor, "Am I going to die?"

'I lost 25 pounds in 11 days. Couldn't eat. Only liquids. Every time I went to the bathroom, it smelled like tar.

'All my coordination, stamina, everything was hectic getting back. I was peaked already. I could have fought him that day. Now, I got to start from scratch. I had, like, eight blood transfusions. The doctor said I lost half my blood. I almost died.'

Earlier this month, it was revealed that these claims were being investigated by officials from Texas Department of Licensing and Regulation - who are overseeing the event.

However, it's expected the Texas Licensing Regulators will not assess Tyson again until the day before the fight takes place. 

Therefore, there is a high risk that the bout could be cancelled just 24 hours before Iron Mike is set to step back into the ring. 

The result of the assessment could see the fight be downgraded from a professional one to an exhibition or even cancelled. 

However, Tyson is confident the bout will go ahead as planned and insists he is ready to dismantle Paul despite suffering a medical emergency earlier this year. 

Tyson has given marijuana up while training to fight Paul because it is on the list of banned substances used by the Texas Department of Licensing and Regulation.

The fighter, who became the youngest heavyweight title-holder at 20 years and four months in 1986, has struggled with a series of health issues in recent years.

Despite showing his enduring class in an exhbition bout against Roy Jones Jr in 2020, Tyson has persistently battled with chronic knee and back problems.

Two years ago, he had a severe sciatica episode which left him in a wheelchair and then using a cane.

- SAM LAWLEY