Pound for pound king Floyd Mayweather believes his next opponent, Marcos Maidana, was close to finishing Amir Khan when the two fought back in 2010.
Mayweather, 37, said in an interview after his press conference to officially announce his May 3 bout that: "Maidana was one round away from stopping Amir Khan."
Khan, 26, fought Maidana for the WBA light-welterweight title in Las Vegas and won by unanimous decision.
Knocking down his Argentine opponent in the opening round with a body punch, Maidana got up and survived the round. Khan dominated the first six rounds before the power of Maidana started to tell later on.
Khan was rocked in round 10 and was close to losing the fight after taking a barrage of punches but the Brit battled on to gamely win over 12 rounds.
Golden Boy promotions have not announced Khan's next fight which is scheduled for May but three opponents have been shortlisted.
Robert Guerrero, IBF welterweight champion Shawn Porter and Luis Collazo, who lost to Ricky Hatton are candidates with the bout potentially on the Mayweather undercard.
The eventual winner will likely face the 'Money Man' in September.
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