The two former world champions are locked in an intense battle to reach the Crucible final, where either Mark Allen or Wu Yize will await ( PA ) Inside Sport newsletter: Get an expert guide to the biggest moments shaping the world of sport Get our free Inside Sport newsletter Get our free Inside Sport newsletter Email * SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our Privacy notice John Higgins and Shaun Murphy continue their enthralling World