Pernille Harder's brace helped Chelsea beat Arsenal 3-0 and maintain top spot in the Women's Super League.

Chelsea started in the ascendency and retained most of the possession in the visitors' half, but failed to test Arsenal goalkeeper Lydia Williams.

Arsenal forward Vivianne Miedema fired a low effort that forced Ann-Katrin Berger to make a save with her legs.

Berger's counterpart Williams produced two saves from Fran Kirby at the end of the first half.

The reigning champions took the lead in the 48th minute through Harder, who hit a low effort into the bottom corner.

After some build-up play from the left, Kirby turned provider once again, gliding the ball to Harder and she smashed her effort into the back of the net.

Chelsea added their third goal late on through Kirby, who slotted a low shot past Williams to earn an important victory. 

Ireland international Katie McCabe was part of the Arsenal side, starting at left-back.

 Megan Connolly tackles Katerina Svitkova of West Ham

In the night's other game, Aileen Whelan's first-half goal was enough for Brighton to secure a 1-0 win over West Ham.

Brighton, coming off a win away to table-topping Chelsea at the weekend, had the better of the play, with West Ham goalkeeper Mackenzie Arnold forced into a fine save to push Nora Heroum's 31st-minute effort over the crossbar.

But Arnold could do nothing moments later as Whelan turned the ball in from a corner.

West Ham's Emily van Egmond struck the bar with a free-kick five minutes later but they could not find an equaliser. 

Ireland duo Megan Connolly and Rianna Jarrett both featured for Brighton - the latter as a substitute.