Del Potro brushes aside Tipsarevic

Juan Martin Del Potro boosted his hopes of reaching the semi-finals of the Barclays ATP World Tour Finals with a crushing 6-0 6-4 victory over a below-par Janko Tipsarevic.

Serbian Tipsarevic has been struggling with illness and, after managing only four games against Roger Federer on Tuesday, he was clearly still less than 100% as he was brushed aside by Del Potro.