Before then, the final WSL game of this round of fixtures takes place on Monday night - and it's a big one as bottom side Bristol City host Reading.
The Robins have been at the foot of the table pretty much all season but could climb above West Ham if they can beat the Royals.
You can follow the outcome of that one here on Monday evening.
Champions League up next
Chelsea and Manchester City are not only duking it out for the Women's Super League title but also for success in Europe.
Both sides took massive steps towards the Champions League quarter-finals in midweek with first-leg wins.
Chelsea take a hard-earned 2-0 lead to Atletico Madrid on Wednesday despite playing most of the first leg with 10 players after Sophie Ingle's early red card. Atletico missed two penalties too.
City's 3-0 win over Fiorentina was far more serene ahead of Thursday's second encounter. You can follow both second legs right here with BBC Sport.
Top four all win
A reminder of Sunday's WSL scores:
Man Utd 3-0 Aston Villa
Birmingham 0-4 Arsenal
Brighton 2-0 Tottenham
Man City 1-0 Everton
West Ham 0-2 Chelsea
Hammers' nerves fraying?
West Ham's defeat by Chelsea might have not been unexpected but it leaves them nervously looking over their shoulders.
They would drop to the foot of the table if Bristol City win at home to Reading on Monday night.
It's surely one of five teams for that solitary relegation spot as Tottenham, Aston Villa and Birmingham all failed to take the chance to move clear on Sunday - and all three remain very much in danger.
BBC SportCopyright: BBC Sport
Still tight at the top
BBC SportCopyright: BBC Sport
So the status quo remains intact for the Women's Super League's top four.
Chelsea, Manchester City, Manchester United and Arsenal all triumph to leave things pretty much where they stood at the start of play today.
The Blues did inch their goal difference one ahead of Manchester City by beating West Ham 2-0 while City won 1-0 against Everton.
Chelsea lead by two points but the meeting between the two sides next month could be decisive in terms of the title's destination.
Manchester United and Arsenal seem set to fight it out for the third Champions League spot, barring a collapse from the two at the top.
FULL-TIME
West Ham 0-2 Chelsea
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All over in London. Chelsea stay top and become the first side in WSL history to win five consecutive games away from home without conceding a single goal.
Post update
West Ham 0-2 Chelsea
Final minute.
Still Chelsea dominate territory and possession.
SUBSTITUTION
West Ham 0-2 Chelsea
West Ham's Laura Vetterlein picks up a knock, she limps off and is replaced by Hawa Cissoko.
I think the change is probably just a precaution.
INJURY TIME
West Ham 0-2 Chelsea
Four minutes of additional time.
Seems a bit excessive to be honest.
Post update
West Ham 0-2 Chelsea
One minute of normal time to go. Chelsea are happy passing it amongst their defenders.
CLOSE!
West Ham 0-2 Chelsea
A lot of power from former PSG and Lyon midfielder Kenza Dali but it's always going over.
Feels like that needed to go in.
Post update
West Ham 0-2 Chelsea
Sophie Ingle fouls Martha Thomas right on the edge of the area.
Free-kick West Ham in the 85th minute...
SUBSTITUTION
West Ham 0-2 Chelsea
Double change for the Blues with six minutes to go.
Drew Spence and Jessica Carter on.
Ji So-yun and Niamh Charles off.
CLOSE!
West Ham 0-2 Chelsea
So nearly again for the Hammers as Redisch Kvamme's cross is just over the head of an unmarked Martha Thomas in the six-yard box.
You've got to applaud the hosts. The inferior side on paper, they've made a game of it.
SUBSTITUTION
West Ham 0-2 Chelsea
First change for West Ham as Katerina Svitkova is replaced by Mayumi Pacheco.
We've got 12 minutes remaining.
HITS THE WOODWORK
West Ham 0-2 Chelsea
Should be three.
A brilliant cross in from Sam Kerr and Chelsea forward Guro Reiten heads the ball against the bar before Courtney Brosnan brilliantly saves from the Norwegian international on the rebound.
And breathe.
Post update
West Ham 0-2 Chelsea
Same as before. All Chelsea without much desire to go forward.
Sophie Ingle does have a go from range though. Her strike is gathered by Brosnan at the second time of asking.
Post update
West Ham 0-2 Chelsea
Getty ImagesCopyright: Getty Images
Twenty minutes to go, no further opportunities after van Egmond's chance.
Chelsea are happy to keep possession and West Ham can't steal the ball from them.
Live Reporting
Josef Rindl and Michael Beardmore
All times stated are UK

Getty ImagesCopyright: Getty Images 

BBC SportCopyright: BBC Sport 
BBC SportCopyright: BBC Sport 
Getty ImagesCopyright: Getty Images 
Getty ImagesCopyright: Getty Images
Latest PostFarewell!
That's all from Michael and I but there's still plenty of football you can follow on the BBC Sport website.
Manchester United are currently leading Manchester City 1-0 in the Premier League. You can follow that live text right here.
And we've also got updates as Atletico Madrid face rivals Real Madrid in La Liga. It's 1-1 in the closing stages, follow that here.
Man Utd cruise to win over Aston Villa
Manchester United strengthen their grip on third spot in the Women's Super League with victory over Aston Villa.
Read morePost update
Before then, the final WSL game of this round of fixtures takes place on Monday night - and it's a big one as bottom side Bristol City host Reading.
The Robins have been at the foot of the table pretty much all season but could climb above West Ham if they can beat the Royals.
You can follow the outcome of that one here on Monday evening.
Champions League up next
Chelsea and Manchester City are not only duking it out for the Women's Super League title but also for success in Europe.
Both sides took massive steps towards the Champions League quarter-finals in midweek with first-leg wins.
Chelsea take a hard-earned 2-0 lead to Atletico Madrid on Wednesday despite playing most of the first leg with 10 players after Sophie Ingle's early red card. Atletico missed two penalties too.
City's 3-0 win over Fiorentina was far more serene ahead of Thursday's second encounter. You can follow both second legs right here with BBC Sport.
Top four all win
A reminder of Sunday's WSL scores:
Man Utd 3-0 Aston Villa
Birmingham 0-4 Arsenal
Brighton 2-0 Tottenham
Man City 1-0 Everton
West Ham 0-2 Chelsea
Hammers' nerves fraying?
West Ham's defeat by Chelsea might have not been unexpected but it leaves them nervously looking over their shoulders.
They would drop to the foot of the table if Bristol City win at home to Reading on Monday night.
It's surely one of five teams for that solitary relegation spot as Tottenham, Aston Villa and Birmingham all failed to take the chance to move clear on Sunday - and all three remain very much in danger.
Still tight at the top
So the status quo remains intact for the Women's Super League's top four.
Chelsea, Manchester City, Manchester United and Arsenal all triumph to leave things pretty much where they stood at the start of play today.
The Blues did inch their goal difference one ahead of Manchester City by beating West Ham 2-0 while City won 1-0 against Everton.
Chelsea lead by two points but the meeting between the two sides next month could be decisive in terms of the title's destination.
Manchester United and Arsenal seem set to fight it out for the third Champions League spot, barring a collapse from the two at the top.
FULL-TIME
West Ham 0-2 Chelsea
All over in London. Chelsea stay top and become the first side in WSL history to win five consecutive games away from home without conceding a single goal.
Post update
West Ham 0-2 Chelsea
Final minute.
Still Chelsea dominate territory and possession.
SUBSTITUTION
West Ham 0-2 Chelsea
West Ham's Laura Vetterlein picks up a knock, she limps off and is replaced by Hawa Cissoko.
I think the change is probably just a precaution.
INJURY TIME
West Ham 0-2 Chelsea
Four minutes of additional time.
Seems a bit excessive to be honest.
Post update
West Ham 0-2 Chelsea
One minute of normal time to go. Chelsea are happy passing it amongst their defenders.
CLOSE!
West Ham 0-2 Chelsea
A lot of power from former PSG and Lyon midfielder Kenza Dali but it's always going over.
Feels like that needed to go in.
Post update
West Ham 0-2 Chelsea
Sophie Ingle fouls Martha Thomas right on the edge of the area.
Free-kick West Ham in the 85th minute...
SUBSTITUTION
West Ham 0-2 Chelsea
Double change for the Blues with six minutes to go.
Drew Spence and Jessica Carter on.
Ji So-yun and Niamh Charles off.
CLOSE!
West Ham 0-2 Chelsea
So nearly again for the Hammers as Redisch Kvamme's cross is just over the head of an unmarked Martha Thomas in the six-yard box.
You've got to applaud the hosts. The inferior side on paper, they've made a game of it.
SUBSTITUTION
West Ham 0-2 Chelsea
First change for West Ham as Katerina Svitkova is replaced by Mayumi Pacheco.
We've got 12 minutes remaining.
HITS THE WOODWORK
West Ham 0-2 Chelsea
Should be three.
A brilliant cross in from Sam Kerr and Chelsea forward Guro Reiten heads the ball against the bar before Courtney Brosnan brilliantly saves from the Norwegian international on the rebound.
And breathe.
Post update
West Ham 0-2 Chelsea
Same as before. All Chelsea without much desire to go forward.
Sophie Ingle does have a go from range though. Her strike is gathered by Brosnan at the second time of asking.
Post update
West Ham 0-2 Chelsea
Twenty minutes to go, no further opportunities after van Egmond's chance.
Chelsea are happy to keep possession and West Ham can't steal the ball from them.