Anthony Ogogo has withdrawn from the undercard of Floyd Mayweather's showdown with Saul Alvarez in Las Vegas on 14 September to focus on regaining full fitness after sustaining a hand injury.
"I'm obviously hugely disappointed by this," said Ogogo. "It was a huge honour for me to be included and it would have been a fantastic experience."
"I could have had injections in it but it's only my fourth fight and I don't want to be going down that road too soon," he added.
The middleweight, a bronze medallist at London 2012, is unbeaten in three contests since he turned pro with Golden Boy in the United States this year.