Hatton on at least one previous occasion has refused to fight Mayweather on the grounds that the first time he wasn't ready and on the second occasion he was not yet known internationally.
However to say that Hatton is/was ducking Floyd is ridiculous. Have you forgotten that the meeting on December 8th was as a result of Ricky's advances and that both fighters sought out the fight and as soon as it went to negotiations the deal was made. For me this illustrates that both parties hatton and mayweather were anxious to make this fight.
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