James Tennyson says he is ready to step up to the next level and mix it with the best 135lbs fighters on the planet, and the heavy-handed Belfast banger intends on proving it when he takes on unbeaten Canadian Josh O’Reilly at The SSE Arena, Wembley this Friday, live on Sky Sports and DAZN.‘The Assassin’ (27-3, 23 KOs) continued his destructive form last time …