British boxer retires after emerging from coma

"No that's me done," Blackwell tweeted after being asked by on the social media site if he would be making a comeback.

"I can't put my friends and family and self through that again but I'll still be involved."

Blackwell, a former British middleweight champion, told Eubank Jr. that he held no grudges after he collapsed in the ring. The fight was called off in the 10th round because of swelling over his left eye.

After the 25-year-old emerged from the coma, he posted a message of thanks for the support he had received, leading Eubank Jr. to ask after his well-being on Twitter.

Blackwell replied saying, "No hard feelings, we were both there doing a job and it was unfortunate for what happened but I hope your OK champ."