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Roger Federer beats Zverev to win ninth Halle title | Gerry Weber Open Halle 2017 Final Highlights - YouTube
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Roger Federer progresses to quarters after straight set victory over Mischa Zverev in Halle - Eurosport
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Alexander Zverev can challenge Federer in Halle, says tournament director | Alexander zverev, Roger federer, Tennis players
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Roger Federer rolls back years to set up Halle final against Alexander Zverev | Aegon Championships 2017 | The Guardian
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Tennis/Herren Gerry-Weber-Open 2017 Gerry-Weber-Stadion/Halle Halle/Westf 24-06-2017 - SportMarkt - Onlinemagazin
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Improving Roger Federer beats Mischa Zverev to reach Halle quarters | Tennis News, The Indian Express
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