Then Mayweather was joined on stage by his uncle and trainer Roger Mayweather, and the hip-hop star 50 Cent.

WSJ: Jason Gay: Plenty of Pomp, Not as Much Circumstance

His sessions on the pads with uncle and trainer Roger Mayweather were breathtaking.

BBC: Focus on De la Hoya v Mayweather

An American coach is also a possibility after the Olympic silver medallist spent a short time working in the gym with Roger Mayweather, uncle and trainer of Floyd Mayweather, during his recent trip to Las Vegas for the Calzaghe-Bernard Hopkins fight.

BBC: Khan appoints temporary trainer