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Felix Auger-Aliassime is into the semifinals of the U.S. Open, exactly four years after the first and only time the 25-year-old Canadian had reached the final four at a Grand Slam tournament. Seeded 25th, Auger-Aliassime upset No. 8 seed Alex de Minaur of Australia 4-6, 7-6 (7), 7-5, 7-6 (4) in Wednesday's quarterfinal to…
