Dallas and Cincinnati programs will open in February, Chicago in March and San Diego in April.

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He missed the Olympics, then passed on Open tuneups in Toronto and Cincinnati.

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Murray arrived in Russia having sealed back-to-back Masters Series titles in Cincinnati and, last week, Madrid, after reaching the US Open final in between.

BBC: Unstoppable Murray retains title

After tournament victories in Cincinnati, Madrid and St Petersburg, and with a first Grand Slam final at the US Open in between, Murray had finally begun to show signs of a dip in form this week.

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