England's Daryl Selby bemoans standard of squash refereeing ahead of Qatar World Championships Selby, 30, heads into this week's World Championships in Doha, Qatar hoping to reach beyond the third round at the tour's showpiece event for the first time in his career. Selby's comments stem from his second round defeat to Karim Darwish at last week's Hong Kong Open where the Englishman said that the referees, some of whom were local officials, "didn't help his cause" in his four-game defeat. At that event, local officials were used as main referees, which also saw double world champion Nick Matthew penalised during his semi-final defeat to eventual winner Ramy Ashour, of Egypt. The incident occurred when the Englishman retorted that one point was "the worst decision in history." The WSF's pool of referees on the world tour are currently all unpaid but Selby says that funds must be made available to secure a professional body. "They would then be on the same line of thinking [as the players]," he added. Selby's compatriot James Willstrop is top-seeded in Qatar as he aims to become world champion for the first time. Matthew's path to a third world title has been made all the more harder thanks to a star-studded lower half of the draw, which includes Egyptian Ashour.