Australia's boxing community was in shock Sunday after middleweight Dwight Ritchie collapsed and died aged just 27, reportedly while sparring.
Sydney's Daily Telegraph said he took a body shot on Saturday, walked back to his corner and collapsed. He could not be revived.
It said he was sparring in Melbourne with Michael Zerefa, who is preparing for a rematch with Jeff Horn, a former WBO welterweight champion.
Ritchie's promoter Jake Ellis confirmed the news on Facebook.
"It is with great sadness and shock to announce that the fighting cowboy Dwight Ritchie sadly passed away today doing what he loved," he said.
"As Dwight's promoter and friend it's unbearable to accept the tragic news that's just surfaced." Richie, nicknamed "The Fighting Cowboy", held a 19-2 record.
He last fought in August, losing to Tim Tszyu by a unanimous decision for the IBF Australasian super welterweight title.
"I am truly saddened by the passing of Dwight Richie," Tszyu said on Instagram.
"Only fighters understand the bond shared between them, especially those who shared a ring together. Rest In Peace to a true champion."