WATCH OCT 12 FIGHT NIGHT ► https://bit.ly/FightNightBoxOffice ► Subscribe to Sky Sports Boxing: http://bit.ly/SSBoxingSub ► Watch Sky Sports: https://bit.ly/BuySkySports Artur Beterbiev explains his most extreme workouts. Watch his undisputed fight against Dmitry Bivol here: https://bit.ly/FightNightBoxOffice ► Boxing full fights &…