Play restarts at Prenton Park.

How long until the deadlock is broken – if at all?

Chelsea

Chelsea manager Emma Hayes, speaking to the BBC Sport after the game: "They had four shots and three goals in the first half, they were extremely clinical and I felt like we got bullied in the duals all over the pitch.

"But I think we was too deep in the first half and invited pressure."

On the goals conceded: "They scored from there first chance which is poor form us, the second we got bullied and it was not an area for the keeper [Ann-Katrin Berger] to claim it.

"Then a simple ball in behind and our problems created us an uphill problem.

"Then we gave away a silly penalty, but fair play to Arsenal we did not compete anywhere - the whole team was poor."

On facing Arsenal: "When you play a good team away from home everything is an uphill battle. An extremely difficult gamer to coach.

"I am not going to make excuses I will speak to the players tomorrow about it. We was well and truly beaten.

"We can talk about little moments was Alessia Russo's goal offside? Yes, it looked it but I am not going to focus on that or the calls in the game.

"We have to get back to our standards that was not our Chelsea standard and we have to control what we control."

Well Everton manager Brian Sorensen hasn't exactly gone for one at the back as he threatened he might have to, but he has had to draft in midfielder Aurora Galli to the back line.

West Ham will see this as a real opportunity to get some points on the board.

No rest for the wicked. Away we go in this one between bottom dwellers West Ham and eighth-place Everton.

Football managers like to try new things to get the best out of their team but when injury strikes it can be difficult to come up with solutions.

Everton boss Brian Sorensen was already dealing with injury problems before the international break with midfielder Lucy Hope and defender Elise Stenevik out with long-term injuries.

Now, several players have returned from representing their countries with fresh injury concerns, leaving the Danish boss questioning what formation he will have to play on Sunday when his side face West Ham.

"We have one defender basically," said Sorensen. "It's very frustrating. You'll probably see a new formation - maybe a 1-6-3 formation and we'll see how that goes," he joked.

Denmark defender Katrine Veje rolled her ankle while playing in the Nations League while experienced midfielder Justine Vanhaevermaet came off with a foot injury while playing for Belgium, with both set to be out until after Christmas.

"It's a significant amount of players we don't have available. It is what it is. We have to deal with it," said Sorensen.

There is one amendment to the West Ham United starting line-up from their 3-0 defeat at Arsenal, the versatile Jess Ziu replacing Emma Harries.

Goalkeeper Katie O’Hanlon has been re-registered following her dual-registration at Billericay Town and is on the bench.

West Ham XI: Walsh, Cissoko, Tysiak, Shimizu, Smith, Evans, Hayashi, Stringer, Ziu, Ueki, Asseyi.

Subs: O'Hanlon, Harries, Atkinson, Filis, Denton, Cooke, Stapleton, Ademiluyi, Flannery.

Image source, BBC Sport

Everton manager Brian Sorensen said he had one recognised defender available for this game and joked that he might play a 1-6-3 formation.

There are three changes from his side's 2-1 win at Aston Villa. Katrine Veje rolled her ankle while on international duty for Denmark, Justine Vanhaevermaet has a foot injury and Karen Holmgaard is on the bench this time, with Nathalie Bjorn, Toni Duggan and Aurora Galli starting.

Forward Martina Piemonte is serving the second game of a three-match suspension for violent conduct.

Everton XI: Brosnan, Bjorn, Finnigan, Duggan, S. Holmgaard, Wheeler, Bennison, Galli, Snoeijs, Payne, Sorensen.

Subs: Ramsey, K. Holmgaard, Campbell, Bissell, Wilding, Aherne, Olesen.

Image source, BBC Sport

Leicester City have stopped the opposition from scoring a first-half goal in 6 of their 9 games, no team has done this more in the Women's Super League this season.

Arsenal

Arsenal forward Alessia Russo, speaking to BBC Sport after the game.

On the victory: "I don't think Sundays get much better than that. Great day. I thought we started the game really well, we knew we wanted to come out, start positively and the crowd got right behind us from minute one. We worked hard in the week and we were ready for it."

On whether it was a must-win game for Arsenal's title bid: "I think every game is a must-win game for us. We had a tough start to the season but we know where we want to go as a team.

"The league is so competitive that you can't take one game off, especially against a team like Chelsea. So it was a massive game and we know that we had to be at our 'A' game."

Liverpool have stopped the opposition from scoring a first-half goal in 6 of their 9 games, no team has done this more in the Women's Super League this season.

Liverpool have failed to score a first-half goal in 6 of their 9 games, only Everton (7) have failed to score more often in the WSL this campaign.

Arsenal

Arsenal manager Jonas Eidevall, speaking to BBC Sport after the game: "I think it is a strong team performance especially the first half. This is the best we have played this season we have shown out potential. It was really pleasing to see."

On today being an early Christmas present: "Still two more games till Christmas and another game Wednesday and Saturday so it is not Christmas yet!"

Impact of Beth Mead: "You can see how that is coming step-by-step from the Aston Villa game to now it is a joy to see her back.

On being joint leaders with Chelsea: "If i am going to summarise in some ways when we played Chelsea here two and half seasons ago I was knee sliding as that felt big.

"Now what is important is the table at the end of the season, lets not get carried away it does not count if we are not ready for against Tottenham.

"We need to be focused for that."

On injury returns: "Leah Williamson is progressing well and she has started to come into lighter parts of team training."

Gordon: Sorry, Chelsea fans, but this is the result the WSL needed. Blues midfield non-existent today. And great support from the Arsenal fans.

Martin: 4-1, should have been 6 or 7. Arsenal completely outclassed Chelsea and are right in this title fight. Mead and Russo were immense.

Lena Petermann's wonder strike has the Foxes heading for a first WSL victory in seven games.

Brighton have been made to rue their lack of incisiveness up front, work to do for Melissa Phillips and her side in the second half.

You have to say that the Leicester goal feels a little harsh on hosts Brighton, who have looked more threatening so far in this game.

But what can you do when a player decides to hit the ball so sweetly from that distance? Simply nothing Sophie Baggaley could do to stop it.

It ends all square at the break.

Not the most exhilarating of halves.

Marie Hobinger's receiving some treatment. The half is nearly over.

Bristol City's Amalie Thestrup is booked for timewasting.

A cross is played towards Abi Harrison but she isn't ready to control the ball. That's a half-chance missed.

Two minutes of time added on at the end of the first half at Prenton Park.

A brief pause in play as Leicester captain Aileen Wheelan receives a talking to from the referee.

The midfielder was just a little overzealous there when following up a cross into the box and clattered into Seagull's stopper Sophie Baggaley who had rushed out to claim the ball.

Stick around if you're following Arsenal's thrashing of Chelsea as we'll have reaction on the way soon.

If you want to have your say on any of today’s action then you can get in touch via #bbcfootball, WhatsApp on 03301231826 or by texting 81111 (UK only - texts will be charged at your standard message rate.

As always, please remember to leave names with your messages.