Nathan Cleverly has withdrawn from making his cruiserweight debut for a third consecutive time.
The Welsh boxer had been due to fight on 1 March at Liverpool's Aintree Racecourse.
Cleverly, the ex-WBO light-heavyweight champion, had been expected to face a so-far unnamed opponent, having already called off his planned debut twice.
It is understood Cleverly is not ready to fight and a new date will be scheduled shortly.
The 26-year-old's planned debut at the new weight against Daniel Ammann in November was put off as Cleverly had a back injury.
Another back problem ended a fight with Illunga Makubu, scheduled for 1 February in Monaco.
Cleverly moved up in weight after losing his WBO light-heavyweight title to Sergey Kovalev in August.