Ricky Burns' manager Alex Morrison has hit out at Frank Warren following the postponement of the Scottish boxer's unification clash.
WBO lightweight champion Burns was due to face Miguel Vazquez on March 16, but promoter Warren announced the fight would be put back a month as the IBF title holder has a viral infection.
However, Morrison is unhappy as it is the second postponement in the space of three months following the collapse of last year's fight against Jose Ocampo.
"We are very unhappy with this latest postponement," Morrison told STV. "Especially after the fight was called off in December, and now this. This is unacceptable.
"I spoke to Ricky this morning. As you can imagine he's upset.
"He's sacrificed a lot, training and the cost of sparring partners. That's about £12,000 of his own money in training costs he's now down over the last two fights.
"The treatment of him is pretty disrespectful," added Morrison, who refused to confirm whether Burns will fight on the re-arranged April 20 date.
"They can say what they want about it. I'm not saying if it is or isn't going to go ahead on that day.
"Let's just say our relationship with Frank Warren is pretty strained."