James Blake’s Wimbledon campaign has again ended in the first week of the championships. The American number two has never progressed past the third round at the grass Grand Slam in seven appearances, a remarkable record for a player consistently ranked in the world’s top 20.In truth Blake has under-achieved at all four majors – three quarter final appearances from 30 Grand Slam entries is a poor reflection of his talents – but his disappointing Wimbledon record is particularly puzzling.Blake...