Sometime late on Saturday night, Floyd Mayweather will walk out into the great boxing amphitheatre that is the MGM Grand in Las Vegas for his hotly-anticipated rematch with Marcos Maidana.
The fighter is perfectly familiar with these surroundings - his last nine contests have been in that famous ring - but he will still feel that frisson of excitement and adrenaline that comes with placing your unbeaten record and titles on the line.