Martin Olsson believes West Ham's feeble form presents an opportunity for Swansea to boost their Premier League survival prospects.
Swansea dropped into the relegation zone after Wednesday's 3-1 home defeat to Tottenham and they have now picked up only one point from four games.
West Ham's form has been even poorer with five successive defeats sparking relegation fears and raising doubts over the future of manager Slaven Bilic.
The Hammers, five points better off than Swansea, have already lost seven times in the league at their London Stadium home this season - and another defeat would really leave them in relegation bother.