Former UFC fighter Tim Hague dies after boxing KO

Former UFC fighter Tim Hague has died in hospital, two days after being knocked out by his opponent in a boxing fight.

The 34-year-old Canadian fought Adam Braidwood at the KO 79 boxing event in Edmonton on Friday.

“It is with incredible sadness, sorrow and heartbreak to report that Tim has passed away today," Hague's sister Jackie Neil wrote on social media.

"He was surrounded by family, listening to his favourite songs. We will miss him with so greatly."

Hague in one of his five UFC fights. Pic: Getty

Hague reportedly walked out of the ring after being knocked out in the second round before friends and family realised his condition was unusual and took him to hospital.

He underwent surgery and was placed in an induced coma but died 48 hours later.

The Edmonton Combative Sports Commission announced before Hague's death was confirmed that an official review would be conducted.

The heavyweight fighter made his UFC debut in 2009, three years after his MMA career began in Canada, but left the company after five fights.

He continued to fight elsewhere, winning a King of the Cage championship, but stepped away after eight knockout losses.

“I’m gonna take a little break away from MMA, let the brain heal from my concussion, and get the passion/fire back," he said in 2011.

Hague was a primary school teacher outside the ring.