In the minutes after an epic 10-round bout, young Toowoomba boxer Braydon Smith was pictured smiling, shaking hands with coaches and the referee. Just days later, he was dead.

The 23-year-old law student collapsed after losing his 10-round bout with Filipino contender John Moralde on Saturday night.

When the bell rang, Smith was upright, seemingly lucid, and proceeded to chat with friends ringside.

Drinking a sports drink, he appeared to have some bruising under his right eye, and some redness over his brow.

Family representative James O'Shea said the young boxer - nicknamed "The Great White" - had been alert and talkative when they spoke in the dressing room after the fight.

But then his condition took a sudden turn for the worse. He was placed into induced coma at Brisbane's Princess Alexandra Hospital.

It was here that he died on Monday afternoon.

Mr O'Shea said the ordeal had been extremely tough for Smith's family.

"He really wanted to change the image of boxing," Mr O'Shea said.

"A lot of times in this country the sport gets a bad rap."

"A big goal of his in life was to show people it's not (a bad sport)."

He said the massive outpouring of support from the local and wider community was testament to Smith's reputation.

"So many people looked up to him," he said.

People using the hashtag "prayforbrayd" sent messages of support on social media to a man described as a "true gentleman" of the boxing fraternity.

Smith's father/trainer is Brendon Smith, who is known to many as the former longtime trainer of Michael Katsidis.