Brook reveals disappointment
Kell Brook is "absolutely gutted" after his world title challenge was postponed due to an injury to IBF welterweight champion Devon Alexander.
The American title-holder has hurt his bicep in training camp to scupper the scheduled February 23 fight in Detroit, Michigan.
The bout, originally set for January 19, has already been delayed once when unbeaten Sheffield fighter Brook injured his ankle in December.
"I'm gutted. Absolutely gutted," Brook said.
"I'm still confident I can keep my head right and do the job, because I'm a professional. I've had a fantastic camp and I was ready to go over there and take that title.
"I don't know what's going to happen or what the situation is right now. I've got to wait to speak to Eddie (Hearn, promoter) and find out from him. That's all I can tell you for now."
Brook, the mandatory challenger, is currently away training in the Canary Islands in preparation for the bout.
American promoters Golden Boy have yet to announce the postponement officially but Brook's handlers, Matchroom, confirmed the reports.
It is hoped Alexander will recover quickly and that the bout will only be delayed by four to six weeks. Matchroom boss Eddie Hearn is currently working on new dates with his American counterparts.
"We're really disappointed," Hearn said.
"We found out earlier today that Devon Alexander has picked up an injury to his bicep and they think it's going to be roughly a four-week delay.
"It's very disappointing but this is boxing, it happens.
"Kell's got to stay focused and keep his wits about him because he's the mandatory challenger, he's not going anywhere.
"So he's just got to stay focused and I'm pushing Golden Boy for a new date as soon as possible."
Hearn added: "Kell's absolutely gutted but like I say, it's not like he's just a voluntary challenger and the fight's going to go away. He's just got to be a pro about it and make sure he does the right things now."