Result: Juan Martin del Potro storms to victory against Janko Tipsarevic in London

Juan Martin del Potro hammers Janko Tipsarevic in straight sets at the ATP World Tour Finals in London.

Juan Martin del Potro has recorded his first win at this year's ATP World Tour Finals with a resounding straight-sets victory over Janko Tipsarevic.

Juan Martin del Potro© PA Photos

The Argentine world number seven was ruthless in the first set as he bludgeoned the under-par Tipsarevic 6-0.

There was slightly more resistance from the Serbian in the second, but Del Potro broke once to see out the match 6-4.

The defeat has all but ended Tipsarevic's chances of reaching the semi-finals, while Del Potro is still able to qualify for the last four when he takes on Roger Federer on Saturday.

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