Nick Blackwell defends his British middleweight championship against Chris Eubank Jr on March 26.

Story highlights

Nick Blackwell collapsed after loss to Chris Eubank Jr. on 26 March.

Placed in an induced coma with brain injury

Wakes from coma after a week

Says on Twitter he is hanging up his gloves

CNN  — 

Boxer Nick Blackwell has retired from the sport after sustaining serious head injuries in his British middleweight fight against Chris Eubank Jr.

The 25-year-old collapsed with bleeding on the brain after the 10th-round defeat on March 26 and was placed in an induced coma in a London hospital.

He woke from the coma a week later and wrote on Twitter he was “on the mend.”

But taking to the social media site again he tweeted Monday, “No that’s me done,” after being asked if he would be making a comeback.

“I can’t put my friends and family and self through that again.”

Blackwell, who says he wants to stay involved in the sport, also responded to a tweet from Eubank Jr., saying he holds “no hard feelings” towards his opponent.

Eubank’s father Chris was involved in an infamous 1991 world title fight which put Michael Watson in a coma for 40 days and left him with life-changing injuries.

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