The former world champion David Haye believes that Joe Joyce 'must win' his fight against Joseph Parker in order for his career and stock to continue to rise. Haye fears that if he is unsuccessful, it could be all over for the Juggernaut. Watch his full interview at the #JoyceParker weigh-ins now ▶️ #JoyceParker | September 24 | BT Sport Box Office 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