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In the first round of the National Bank Open, three-time winner Andy Murray....

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was defeated in straight sets by British No. 1 Cameron Norrie.....

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After being postponed a day earlier in Montreal due to rain, Murray....

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who won the event in 2015 after earlier triumphs in 2009 and 2010....

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finally got going against the American Taylor Fritz in Tuesday night's headline match....

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The 10th seed's strength easily defeated the Scot in the first set...

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but he fought back valiantly in the second. His fury eventually got the better of him...

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as he repeatedly slammed his racket against the floor....

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Fritz ultimately proved to be too powerful, and his 6-1, 6-3 first-round win in Canada .