Djokovic conqueror Querrey into first Slam QF

London - Sam Querrey followed up his shock Wimbledon defeat of Novak Djokovic by beating French veteran Nicolas Mahut 6-4, 7-6 (7/5), 6-4 on Monday to reach his first Grand Slam quarter-final.

Querrey, the 28th seed, is the first American in the last-eight at Wimbledon since Mardy Fish in 2011.

He will face either Canada's Milos Raonic or David Goffin of Belgium for a place in the semi-finals.