Amir Khan's trainer has warned the former light-welterweight world champion he needs to knuckle down in order to maximize his potential.
Khan is set to challenge IBF welterweight champion Devon Alexander in December as he bids to become a two-weight world champion and victory could give the Bolton fighter a lucrative bout against Floyd Mayweather next year.
The 26-year-old was ringside in Las Vegas at the weekend to see Mayweather stretch his record to 45-0 with a majority decision win over Saul Alvarez for the WBC and WBA light-middleweight titles.
