A fantastic half for Chelsea. West Ham will be happy to hear the whistle.

Mayra Ramirez drills a low cross towards Sandy Baltimore who is waiting at the back post, but Kinga Szemik reacts quickly to get across and pounce, palming her close-range effort away.

Six minutes of added time.

It's not just up top where Chelsea have done well. West Ham try to counter-attack but Millie Bright won't let it happen - winning three 50/50s including a well-timed tackle to snatch the ball from Viviene Asseyi.

The scoreline is harsh on Crystal Palace, who defended well for the first hour, but their record in London derbies makes for hideous reading.

They're up to 20 goals conceded (and just two scored) in four matches in the league, having suffered similarly heavy defeats against Tottenham (0-4), Chelsea (0-7) and West Ham (2-5).

Without wishing to be too doom and gloom, their next outing is against Spurs...

And here's two changes for Palace.

Felicity Gibbons and Abbie Larkin come on in place of Lexi Potter, who picked up a yellow card seconds before her withdrawal, and Lily Woodham.

Arsenal make their fourth change, with Katie Reid coming on for Emily Fox, who delivered a lively performance down the right.

This game is lively (albeit most of the action is being provided by Chelsea).

The visitors go up the other end after Seraina Piubel's miss and Catarina Macario takes aim from the edge of the box, but her low shot it pushed away by Kinga Szemik.

Argh! Big chance for West Ham!

Seraina Piubel has the ball inside the box after being slipped through by Anouk Denton.

Piubel skips to the side of Millie Bright and gets one-on-one with Hannah Hampton, but she slices wide.

So close again!

Sandy Baltimore has the ball inside the box after an excllent backheel from Mayra Ramirez.

She drags it across the face of goal and nobody is there to turn it home.

Arsenal have a penalty after Annabel Blanchard is adjudged to have fouled Caitlin Foord.

Crystal Palace aren't happy but the referee did not hesitate in pointing to the spot.

Chelsea have an effort cleared off the line!

Mayra Ramirez cuts the ball back after she's slipped in by Niamh Charles.

Her pass deflects off a West Ham player and falls perfectly in the air for Aggie Beever-Jones, but her header is nodded clear by Anouk Denton.

Could Arsenal have had a fourth?

It all gets a bit chaotic in the Palace box and in the end, they may have been saved by the back of Arsenal substitute Rosa Kafaji at the far post.

West Ham go forward for the first time of the game as the ball is sent forward to Seraina Piubel.

Any hope is incredibly short-lived, though. The ever-dependable Erin Cuthbert is straight across to win the ball back.

A double switch for Arsenal.

Goal-scorer Beth Mead and Kim Little give way to Rosa Kafaji and Lia Walti.

A second change for Crystal Palace with Josie Green making way for Molly-Mae Sharpe.

Anouk Denton is back to her feet and play continues.

25 minutes played, 69% possession for Chelsea. Seven shots and four on target to none for West Ham.