John Fury insists a 'signed' deal for Tyson Fury v Anthony Joshua far from guarantees that the super-fight happens. He added that his son will walk away from biggest fight in world boxing, for the time being, if it stops him fighting twice in 2021. 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