Image source, PA

So, what a final day we have in prospect, next Sunday 4 October, in Women's Super League One.

Chelsea know that a win at home to Sunderland will ensure their first ever league title, and they might not need that, depending on Manchester City's result at home to Notts County.

Today was the day that Bristol Academy were relegated to WSL 2, while Doncaster Rovers Belles and Reading were promoted to WSL 1.

Tonight was the night Chelsea guaranteed at least Champions League football, and Arsenal Ladies were mathematically ruled out of contention for the title.

See you next week for what promises to be a thrilling finale. Good night.

It was a superb win for Emma Hayes's side tonight but has it come at a cost for the Blues?

Image source, PA

  Eniola Aluko limped off with a nasty-looking knock, so it remains to be seen whether Chelsea will have the benefit of her pace and energetic runs down the wing next weekend.  

Liverpool boss Matt Beard tells BT Sport:

"Chelsea are a top side. In the first half, I felt we did well.

"If you're going to give the ball away in poor areas of the pitch then, ultimately, you're going to get beaten.

"I can't fault the effort of the players.

"I think the FA Cup was a big thing, psychologically for Chelsea. I think that will give them the strength to go and win next weekend."

Chelsea boss Emma Hayes tells BT Sport:

"We've made the Champions League so it is a massive victory for us.

"To be honest, they frustrated the life out of me, but they won the game 4-0. They were clinical.

"(Ji) is becoming even more settled (in the UK). Today she showed her quality.

"For me, she was a star performer today. She was absolutely outstanding.

"Fran (Kirby) is a wonderful character. I knew a goal was due for her. She has settled in really well, gets on well with all the girls. Tonight it was a good finish from her.

"We want to lead from the front and I think we deserve to be where we are at this current stage."

Image source, PA

Chelsea striker Fran Kirby, who netted their second goal tonight, tells BT Sport:

"They had a good spell in the first half but we scored goals at really important times.

"We knew we had to come here and get a result. 2-0 for me is a really scary scoreline, so I'm glad we got the other goals.

"Fingers crossed we lift it (the league trophy) next week."

So, Chelsea stay in the driver's seat for what would be a first league title in their history. If they play like that again next week, surely they will finish the job?

Liverpool had their moments tonight, at 0-0, but Chelsea punished them with a clinical display of finishing.

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The final whistle goes. Chelsea have secured at least a top-two finish, meaning Champions League football for the winter of 2016-17.

But more significantly, they have kept the destiny of the league title in their own hands.

Ana Borges goes into the referees book for a late challenge on Libby Stout, which caused that injury.

Thankfully Stout appears to be OK.

Liverpool keeper Libby Stout is receiving treatment on the pitch. She looks in pain.

Image source, The FA

Two minutes of added time have been indicated. Chelsea are heading back to the top of the league, ahead of the final weekend.

Liverpool keeper Libby Stout does well to come and claim that corner, and it remains a four-goal cushion for the visitors.

Tonight's attendance is confirmed as 1, 013 at the Select Security Stadium in Widnes. We are into the closing stages and Chelsea look very comfortable. They win a corner on their left flank.

Asisat Oshoala has a go from range, but that is way off target. Liverpool are running out of ideas. They've been resoundingly beaten tonight.

Chelsea are cruising to victory now then, and just how significant could this scoreline be in terms of their goal-difference?

A draw in their final game might now see them win the league, unless Man City thrash Notts County by several goals in their final game. 

For example, a narrow 1-0 win for City, coupled with a Chelsea draw on the final day, would now not be good enough for City to overtake the Londoners in the title race.

Liverpool bring on Nigerian winger Asisat Oshoala for Line Smorsgard. The Reds will be pleased to welcome back Oshoala after injury.

Chelsea make their third and final change of the night. Drew Spence is replaced by Laura Coombs in midfield, which is something of a straight swap, tactically.

Image source, The FA

Worrying news for Chelsea as Eniola Aluko limps off with help from two physios.

She is replaced by Ana Borges.

The television microphones quite audibly pick up Aluko saying "stupid pitch" as she exchanges words with Borges.

This match is being played on an artificial surface, I should point out. Make of that what you will.

Jo Currie, BBC Sport at the Select Security Stadium:

"Liverpool are getting worn down by Chelsea's constant attacks. They're still pushing for a goal of their own, but Emma Hayes' side are looking the more dangerous of the two."