BBC Sport - ATP World Tour Finals: Andy Murray beaten by Kei Nishikori

Murray suffers loss to Nishikori

Andy Murray makes a disappointing start to his ATP World Tour Finals campaign with a straight-sets defeat by Japan's Kei Nishikori at the O2 in London.

The Briton fought back from 4-1 down in the second set to level, but Nishikori broke serve for a third time to win 6-4 6-4.

With six-time champion Roger Federer and in-form Milos Raonic still to play, Murray faces a tough task to claim one of the two semi-final places from Group B.

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