Top seed Novak Djokovic recorded a routine win at the US Open to stay on track for a calendar Grand Slam, while Alexander Zverev marched on in ruthless fashion.
Routine win for Djokovic; Zverev extends winning streak to 13
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Top seed Novak Djokovic recorded a routine win at the US Open to stay on track for a calendar Grand Slam, while Alexander Zverev marched on in ruthless fashion.