Djokovic beat Goffin in one hour and 29 minutes, extending his head-to-head record against the 2017 champion to seven wins, and will now face Australia's Millman who beat American Reilly Opelka in the other semi-final. Top-seeded Djokovic hit seven aces and won 87% of his first-service points against Goffin in the Serb's first tournament since withdrawing from the U.S. Open fourth round with a shoulder injury.