Premiership sides aim to show new strength in Champions Cup quarter-finals

• Bath, Northampton, Saracens and Wasps all away in quarter-finals• ‘I think all the teams have a chance,’ says Saracens’ Mark McCall• French adventure forces Abendanon to start all over again The relative strengths of Europe’s three professional leagues have long been disputed. Many continue to assume the French Top 14 is the more powerful, the Premiership is the most competitive and the Pro12 breeds more skilful players. It is not often these cosy stereotypes are subjected to the scrutiny that awaits this weekend.Take Leinster v Bath. From across the Irish Sea this week it has been suggested…