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Novak Djokovic withdraws from ATP Cup, heightening doubts of his Australian Open participation - CBSSports.com
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Novak Djokovic withdraws from ATP Cup event in Sydney - raising further doubts over Australian Open participation | World News | Sky News
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Australian Open 2019: Denis Shapovalov, Canadian young gun not daunted by Rod Laver comparisons, ATP ranking
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Andy Murray is OUT of next month's Australian Open because of injury – and ATP Cup spot is also in jeopardy
Australian Open 2019: Novak Djokovic address Rafael Nadal 'snub', first round win result, highlights, video
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Roger Federer, Rafael Nadal, Novak Djokovic commit to new ATP Cup, to be played before Australian Open-Sports News , Firstpost
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