BRITAIN-SHEFFIELD-SNOOKER-WORLD CHAMPIONSHIP-FINAL.(180507) -- SHEFFIELD (BRITAIN), May 7, 2018   Mark Williams of Wales competes during his final with John Higgins of Scotland at the World Snooker Championship 2018 at the Crucible Theatre in Sheffield, Britain on May 7, 2018. Mark Williams won 18-16 to claime the title. (Credit Image: Â© Han Yan/Xinhua via ZUMA Wire)