Colin Hart: This is a big fight but they're not bigger than Ali

Colin Hart on the fight tonight: "We hope it's going to live up to the hype... it's going to be very difficult".

"Mayweather at 38, Pacquiao at 36 are past their best yet they're still considered pound for pound the two best fighters in the world today".

"It could be a great fight...this all points to a 12 round fight".

"There's no atmosphere like a big fight... this is big but they're not bigger than Ali".