The Portland Thorns have already played four matches this month against teams with whom they are jockeying for playoff position. They'll make it five this evening with their third meeting against the Washington Spirit, who sit just behind them in the standings.
The Spirit will be looking to beat the Thorns for the first time this season and pass them in the standings. A win for the Thorns, on the other hand, will strengthen their hold on third place and bring them a little close to FC Kansas City in second.
Here's what you need to know: