Defending champion Andy Murray suffered a shock quarter-final exit to American Sam Querrey at Wimbledon on Wednesday while second seed Djokovic was a set and 2-0 down when he conceded defeat to Tomáš Berdych due to injury. And seven-time champion Roger Federer needed just under two hours to see off Canadian Milos Raonic to set up a final four meeting with 11th seed Berdych.