By Tom Hayward LONDON (Reuters) – Grigor Dimitrov set up a mouth-watering quarter-final clash with Wimbledon title holder Andy Murray after a 6-4 7-6(6) 6-2 victory against Argentine Leonardo Mayer on Monday. Nicknamed Baby Fed for the similarity of his playing style with that of 17-times grand slam champion Roger Federer, the Bulgarian 11th seed extended his winning run on grass to nine matches with a plethora of eye-catching shots. He won his fourth career title in the traditional Wimbledon warm-up event at Queen’s Club this month and has now followed up by booking his first quarter-final at the All England Club. I'm just aiming to be better and better every time." His showdown against Murray, who has breezed through to the last eight without dropping a set, will be the truest indication yet of Dimitrov's progress.