I n rare heavyweight fights like Fabio Wardley vs Daniel Dubois , all the traditional safety measures can get lost in the drama and savagery of the night. The corner, the referee and the doctors are ringside in boxing to make sure the fighters leave the ring healthy. But on Saturday night on the outskirts of Manchester, close to midnight at the Co-op Live arena, 18,212 fanatics played their part in an unforgettable fight that crossed several of the sport’s boundaries . It was a blood-thirsty Saturday-night crowd, and they packed the new arena in anticipation of something special, something memorable, and something brutal – they got all three. The WBO heavyweight title was just a trinket attraction . Wardley was rescued after 28 seconds of the 11th round , and Dubois was hauled away to celebrate the win; it was the end of a fight that took both men to the very extremes in a boxing business where total sacrifice does happen. Wardley against Dubois on Saturday had that feeling very early.…