Meanwhile Castillo, a two-time lightweight world champion, is being touted as the possible opponent for Junior Witter's next WBC light-welterweight defence.
The Bradford switch-hitter has long craved an all-British showdown with Hatton, but with Oscar de la Hoya emerging as the favourite to face Hatton on his homecoming, Castillo could get another crack at a world title at 140lbs.
The Bradford switch-hitter has long craved an all-British showdown with Hatton, but with Oscar de la Hoya emerging as the favourite to face Hatton on his homecoming, Castillo could get another crack at a world title at 140lbs.
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