By Declan Walsh Former world heavyweight champion Mike Tyson has criticised the current generation of boxers for their lacklustre style, comparing it to “watching grass grow.” In a YouTube conversation with tennis legend Nick Kyrgios on his GOOD TROUBLE programme, Tyson expressed his disappointment ahead of a highly anticipated fight with Jake Paul in July. “[There’s] more to [it than] being the best,” Tyson stated. “You have to be entertaining. You have to be exciting. They could beat anybody in the world, but they can’t draw 5,000 tickets. You know, that’s because they’re not exciting. The w…