Great atmosphere tonight. Both sets of supporters are bringing plenty of noise.

Early penalty shout as a Chelsea cross appears to be blocked by Hawa Cissoko in the West Ham box, but referee Louise Saunders waves play on.

A tough call that.

Claire Rafferty
Ex-England international on BBC Radio 5 Sports Extra

We can see a flat back five from West Ham as they try to keep it compact. They are happy to allow Chelsea to have the ball.

So just a reminder, anything but a West Ham win sees Chelsea end Manchester United's 58-day run as WSL leaders.

The Blues are primed to go top tonight.

Let's do this.

Claire Rafferty
Ex-England international on BBC Radio 5 Sports Extra

Sam Kerr is one of the best in the world, she's unstoppable.

She struggled to connect with runs in the first half but when the opportunity came at Wembley she took it.

Kerr is the one who consistently steps up.

Right, don't go anywhere. West Ham's match with Chelsea is about to kick-off.

Image source, Getty Images

Arsenal have done it. That's a huge boost to their top three ambitions.

Jodie Taylor is flagged for offside. That should be that.

Sixty seconds left.

Rachel Brown-Finnis
Ex-England goalkeeper

Image source, Getty Images

Who would bet against Chelsea going on to win the WSL now?

They know how to grind out results. Emma Hayes has put together a relentless team.

Arsenal keep hunting for a fifth. Kuhl plays through Giovana Queiroz and the forward smashes the ball against outside of the post and behind for a goal kick.

Two minutes to go.

West Ham are winless in all nine of their WSL games against Chelsea (D1 L8), facing no side more often without winning in the competition (also nine versus Arsenal).

The Hammers are also on a nine-game winless run in the league since a 2-0 away win at Spurs in December. They have scored just four goals while conceding 19 across those winless games.

Smart save from Everton's Emily Ramsey to keep out Arsenal forward Kathrine Kuhl.

Claire Rafferty
Ex-England international on BBC Radio 5 Sports Extra

West Ham can be a stubborn team to play against.

It could be a tight game but Chelsea should get it done late on.

Not much happening as this game draws to a close.

Arsenal are happy to let Everton pass the ball around.

Image source, Getty Images

Chelsea’s nine unbeaten WSL matches against West Ham (W8 D1) is the most they have faced an opponent in the competition without losing.

The Blues have lost just one of their last 24 WSL London derbies (W19 D4), going down 3-2 away at Arsenal in September 2021.

Chance for Arsenal substitute Freya Godfrey but the teenager can't get to Giovana Queiroz's wicked cross.

She wasn't sure whether to go with her head or boot and ends up missing the ball when any sort of contact would have delivered her her first Arsenal goal.

Chelsea are playing West Ham off the back of winning the Women's FA Cup for the third time in a row, beating Manchester United 1-0 in Sunday's final at Wembley.

Fatigue could be a worry tonight with Emma Hayes saying mental tiredness was of more concern than any physical toll.

"It would take a lot more out of you if you lose," Hayes added. "When you win everything feels a little lighter and I said at the weekend our brains were tired more than anything else.

"People always assume tiredness is to do with the legs. It's not even about getting our legs fresh for Wednesday but we need to get our brains right, getting our sleeping patterns right because it's hard to sleep off the back of games like that on Sunday.

"We do have a sleep specialist, Shona, who we have worked with for years. She helps devise some of the sleep strategies for us."

We've got 10 minutes added on.