The long-awaited rematch between Roy Jones Jr and Bernard Hopkins is in jeopardy, according to reports.
Roy Jones Jr won his first fight with Bernard Hopkins
The ring legends were due to meet in a light heavyweight clash on 11 March but a money dispute means the fight could now be postponed or even scrapped.
Jones won a decision over Hopkins in 1993 at middleweight, a division the latter went on to rule for many years.
The pair, aged 36 and 40 respectively, had agreed for a return bout in the USA to serve as a farewell fight for both.
In his last fight on 1 October, Jones lost a decision to light heavyweight Antonio Tarver.
Hopkins, who turns 41 on January 15, lost to Jermain Taylor on 3 December.