Mr Graham, 53, told the hearing that he had always received 10% of the purse in Hatton's fights.
He claimed he was not paid at all for Mr Hatton's fight against Juan Lazcano at the City of Manchester Stadium in May 2008, and that he was owed money for the clash with Mayweather in Las Vegas in December 2007.
He accused the fighter's father Ray Hatton of short-changing him by getting him to sign an agreement for a fixed amount of just over £451,000 - despite a total purse for the Mayweather fight alone of more than £10m, after lucrative pay-per-view deals in both the US and the UK.
He claimed he was not paid at all for Mr Hatton's fight against Juan Lazcano at the City of Manchester Stadium in May 2008, and that he was owed money for the clash with Mayweather in Las Vegas in December 2007.
He accused the fighter's father Ray Hatton of short-changing him by getting him to sign an agreement for a fixed amount of just over £451,000 - despite a total purse for the Mayweather fight alone of more than £10m, after lucrative pay-per-view deals in both the US and the UK.
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