KICK-OFFpublished at 15:09 British Summer Time 5 September 2021
Brighton 2-0 West Ham
Back under way and West Ham have made a couple of changes for the second half with Kate Longhurst and Lucy Parker on for Melisa Filis and Grace Fisk.
Brighton 1-0 West Ham - listen to BBC Radio 5 Live Sports Extra online-only commentary on this page
Kaagman and Geum-min on target for hosts after Cissoko dismissed
FT: Arsenal 3-2 Chelsea
Miedema and Mead (2) on target for Gunners, Cuthbert had levelled and Harder scores a second
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Emma Sanders and Gary Rose
Brighton 2-0 West Ham
Back under way and West Ham have made a couple of changes for the second half with Kate Longhurst and Lucy Parker on for Melisa Filis and Grace Fisk.
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Brighton 2-0 West Ham
Lee Geum-min joined Brighton permanently in the summer, having been on loan last season from Manchester City.
She got three goals last term and is already up and running for this campaign.
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Benjamin Watts: Big result that for Arsenal against the champions Chelsea, WSL season poised to be an exciting one!
Brighton 2-0 West Ham
So far, so good for the hosts!
Brighton 2-0 West Ham
A bit of a scramble in the Brighton box as the defence struggles to deal with a free kick. Eventually, Gilly Flaherty clips an effort just wide of the goal.
Brighton 2-0 West Ham
A couple of minutes to go until half time and I am not sure where West Ham go from here. Long, long way back now.
Lee Geum-min
Great finish!
West Ham are a mess at the back and a loose ball is pounced upon by Lee Geum-min, who takes full advantage by stabbing in.
Nightmare 10 minutes or so for West Ham.
Brighton 1-0 West Ham
... decent ball in but Brighton head away and then break!
Ellie Brazil leads the charge with Danielle Carter in support but the latter just strays offside when the pass comes.
Brighton 1-0 West Ham
Can West Ham respond? Adriana Leon wins a free kick on the right side of the box and a decent opportunity for the visitors now...
Brighton 1-0 West Ham
What a blow for West Ham. They were looking the most likely to score for so long but now they find themselves a goal and a player down.
Ten minutes to go before the break and they need to keep it together and keep themselves in the game.
Inessa Kaagman
Perfect penalty!
The keeper guesses the right way but there's no stopping this from Inessa Kaagman and Brighton lead!
Brighton 0-0 West Ham
And a red card for West Ham!
Looks like there was a handball to block a goalbound shot and Hawa Cissoko is dismissed.
What an opportunity for Brighton now...
Brighton 0-0 West Ham
These games have been tight in recent times with last season's two fixtures being decided by a single goal. Looks like that pattern will continue today as things are very tight.
Brighton 0-0 West Ham
Wow! Superb effort from Adriana Leon!
The lively West Ham forward has a go from distance and the swirling, dipping effort smacks against the crossbar.
Just seen the replay and she definitely meant it. What a goal that would have been!
FT: Arsenal 3-2 Chelsea
Rachel Brown-Finnis
Ex-England goalkeeper on BBC Radio 5 Live
Seeing the quality, seeing the world class players we have at our disposal in the WSL. Arsenal were at full tilt today, all the Arsenal fans can see the side have energy and a style. There is a real tactical nous about them, it was immaculate, a perfect performance from Arsenal.
Arsenal took a real pride abour executing the little things. They will be exceptionally happy. Chelsea only conceded 10 goals all year last time and Arsenal have scored three today.
Arsenal 3-2 Chelsea
It's all over. The Emirates lets out a gigantic roar. What a performance from Arsenal and what a way to kickstart their season.
They have seen off the defending champions who lost only once in the league last season. Huge victory for Arsenal!
Arsenal 3-2 Chelsea
Chelsea are on the attack...
It's crossed in from the left, blocked in the middle and Fran Kirby chips it way over the bar.
The Arsenal fans roar "wahaaaay".
Brighton 0-0 West Ham
It is just starting to feel like West Ham are getting into their groove now, with Adriana Leon looking particularly lively.
Arsenal 3-2 Chelsea
Vivianne Miedema launches the ball up the pitch for Nikita Parris to give chase.
Seconds to go.