Bradley Watson's boxing career in doubt
Bradley Watson, Guernsey's only professional boxer, could be out of the sport for a year after he was left with a broken jaw in a street attack.
The incident happened at Le Pollet at 00:40 BST, on Saturday night.
Mr Watson, 20, had an operation in Southampton General Hospital on Monday and was discharged earlier.
"If it's a real bad one, he could be out for up to 12 or 18 months. It's not going to help his confidence," Graham Guilbert, his former coach, said.
"In his weight, he's got some strong lads. There were a couple of hard-hitters lined up for him.
"He's going to have to be very careful now and a lot more defensive once he's back in training."
Guernsey Police said another man had been seen running towards the Weighbridge shortly after Mr Watson was attacked but they had no information about his appearance.
He turned professional earlier this year and was preparing for his third bout, after winning his first two against Bulgarian Salim Salimov and Anwar Alfadli from Sheffield.
He was signed up by promoter Frank Maloney in between those victories.