Stanislas Wawrinka routs Tomas Berdych in London

Australian Open champion Stanislas Wawrinka has got his ATP World Tour Finals campaign off to an emphatic start with a 6-1 6-1 victory over Tomas Berdych.

Wawrinka began the match in confident fashion, holding serve to love in the opening game before breaking Berdych in the next.

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The Swiss player's dominance continued as his power from the baseline could not be matched by the error-prone Berdych. He broke again in the fourth game before claiming the opening set 6-1 in just 25 minutes.

Wawrinka was barely troubled in the second as he broke twice more to open up a commanding 4-1 lead. The 29-year-old then closed out the one-sided encounter 6-1 6-1 with an hour played.

The other two players in Group A, top seed Novak Djokovic and US Open champion Marin Cilic, meet later this evening at the O2 Arena.