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BBC Sport on Twitter: "Andy Murray slips to 6th in ATP world rankings, with Stanislas Wawrinka up to career-high 3rd http://t.co/qX0S7e9Fz1 http://t.co/oLK9JkMsse" / Twitter
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Miami Open: Daniil Medvedev misses out on becoming world number one after loss to Hubert Hurkacz - BBC Sport
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