1. Timothy Bradley
A former two-weight world champion, Bradley is one of the top fighters on the planet and looks set to be reinstated as WBO world welterweight champion after picking up the interim title and with Floyd Mayweather being stripped of the full belt. If that were to happen, a fight with Kell Brook would then have extra weight as it would become a unification bout. Having beaten the likes of Devon Alexander, Juan Manuel Marquez and Manny Pacquiao (albeit controversially), Bradley would be a huge test for the unbeaten Brook.