Gatland believes the Zurich Premiership has evolved into a " worldclass" league, one that can stand alongside the Super 12 tournament in the Southern Hemisphere. "The standard of the Premiership is worldclass," he added. "The quality of the players is superb and the competition is very even." Quins are missing young centre Chris Bell, who has an ankle injury, while England prop Mike Worsley and George Harder, the Samoan wing, will make their league debuts.