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US Open 2019: Despite five-set win, Alexander Zverev must avoid long-drawn battles to keep Grand Slam hopes alive-Sports News , Firstpost
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Alexander Zverev looks to regain form at 2019 US Open - Official Site of the 2021 US Open Tennis Championships - A USTA Event
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Top 5 Photos, US Open Day 6: Zverev claws out win; Nadal's giant grin | TENNIS.com - Live Scores, News, Player Rankings
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