Joe Calzaghe went in to his fight with Bernard Hopkins as an undefeated underdog. After being knocked down in the very first round, he seemed to have met his match, but then he went on to win over 12 rounds and become a two-weight world champion... #WhatWentDown Subscribe to BT Sport Boxing on YouTube ➡️ http://www.youtube.com/c/btsportboxing Follow BT Sport Boxing on Twitter ➡️ http://twitter.com/btsportboxing Join our BT Sport Boxing Facebook Group ➡️ https://www.facebook.com/groups/BTSportBoxing/ Follow us on Instagram ➡️ http://instagram.com/btsportboxing Read more on upcoming fights on BT Sport and BT Sport Box Office ➡️ http://www.bt.com/sportboxoffice