Boxing promoter Bob Arum has warned Anthony Joshua that a second bout with Daniel Dubois would be the ‘worst thing’ for him. AJ was crushed inside just five rounds last month, with the 34-year-old losing to his fellow Briton at a packed-out Wembley Stadium. Joshua had gone into the contest as the favourite after his emphatic victory over Francis Ngannou back in March. Yet Dubois put on a masterclass in the capital, with the 27-year-old flooring his opponent multiple times before finally getting the job done in the fifth round. Arum, speaking to Yardbreaker, has now ripped into the Watford-born…