Mark Williams labelled Neil Robertson as the world's best player after Ronnie O'Sullivan 's shock defeat at the English Open.
Three-time world champion Williams hit two centuries - including a historic 147 - in an epic quarter-final match but was eventually downed 5-3 by the brilliant Robertson at the Brentwood Centre.
Williams, 47, became the oldest player to make a competitive maximum break against Robertson in the fourth frame, but could do little to stop the Thunder from Down Under from storming into the semi-finals in Essex.
