Amir Khan's trainer had reservations about the upcoming bout with Saul "Canelo" Alvarez.
The WBC middleweight title bout was announced in February, with some surprised that Khan would fight above welterweight for the first time, and against such an experienced opponent.
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Khan and Alvarez will meet in Las Vegas on May 7.
"Initially I wasn't for the fight. What changed my outlook on it was Amir's response to me when I asked him, do you want this fight," trainer Virgil Hunter said in a media conference call on Tuesday.