Andy Murray celebrates his quarter-final victory over Juan Martin Del Potro at Flushing Meadows. Photograph: Scott Heavey/Action Images
Andy Murray reached his first grand slam semi-final here at the US Open with a 7-6, 7-6, 4-6, 7-5 victory over Juan Martn del Potro that ultimately owed everything to the Scot’s superior tactical ability and technique, although [...]