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By Jonathan Jurejko
BBC Sport in Flushing Meadows
Following the Grigor Dimitrov of Bulgaria won a thriller to conquer the great five-time winner Roger Federer is from this US Open.
Federer, 38, had won all seven of their past meetings to get a 6-4 3-6 6-4 6-2 win in New York, however Dimitrov fought back.
Injury triggered federer in the latter phases, permitting victory to be run away with by unseeded Dimitrov.
Dimitrov, 28, will play Russian fifth seed Daniil Medvedev from the previous four.
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