One minute to go. Chelsea have it in the corner.

Two minutes left. Chelsea playing keep ball. West Ham haven't touched it since we've ticked past the 90.

Erin Cuthbert drags a shot well wide for the hosts. Three minutes left. West Ham launch the ball upfield.

Image source, Getty Images

Kim Little can't convert the spot-kick and Birmingham survive again!

It's a fantastic diving save by Hannah Hampton in the Blues goal!

Six minutes added on. Can Chelsea survive? Will West Ham nab an equaliser?

Stunning save as Guro Reiten free-kick is kept out by Arnold diving to her right.

Into the 89th minute. Chelsea have a free-kick in a dangerous position. Can they kill this game off?

Jayne Ludlow
Wales manager on the BBC Red Button

It's disappointing for Chelsea to get an own goal here but it's great for West Ham.

The neutrals may say it's what West Ham have deserved. They have a few more minutes to get back into it.

No goals to report elsewhere this afternoon but Reading have gone close against Bristol City after a barnstorming run from Danielle Carter is ended by some smart goalkeeping from Sophie Baggaley.

Birmingham have held Arsenal off for the opening stages but Vivianne Miedema and Kim Little have both gone close and the pressure is building on the Blues.

We're still waiting for a goal at Spurs against Brighton too.

I'm sure one will arrive soon - where do you see it coming?

Chelsea have a run of five games in 15 days coming up. They'll have stronger opponents to face, but they have been so impressive and clinical in front of their home fans today.

Two minutes to go, plus added time.

Should have been four. A cut-back finds a free Fran Kirby in the box, but the England forward blasts it straight against West Ham keeper Arnold.

The visitors are still in this game. Just.

Last role of the dice from temporary Hammers boss Billy Stewart on his first game in charge.

Martha Thomas is replaced by Switzerland international Alisha Lehmann.

Image source, Getty Images

We tick past the 80-minute mark. Remember you catch the last 10 minutes of this game on the BBC Sport website and BBC Red Button.

Fran Kirby wins a free-kick out wide. Incredible to think this is her first game back since early November.

She's been sensational this afternoon with two assists to Sam Kerr.

Arsenal straight into the groove at Meadow Park and Jill Roord fires over from just outside the box.

Birmingham City do not enjoy a good record against the Gunners and will need to be on their mettle against the league's top scorers today.

Just over five minutes gone and it remains all-square.

Last 15 minutes in this one. Chelsea are just saving energy now with one eye on their midweek tie away to Benfica in the Champions League.

This has been a very professional performance from the Blues.

West Ham also make a switch. Katerina Svitkova on for Leon Adriana.

That's Kerr coming off, she looks okay now though.

The first WSL player to get a standing ovation in months. Erin Cuthbert is her replacement.