Postpublished at 20:43 Greenwich Mean Time 6 March
Arsenal 4-0 Aston Villa
Free kick to Arsenal out wide near the left touchline.
Sara Mayling's frustrations get the better of her and she shoves Steph Catley to the floor once the ball is gone.
FT: Arsenal 4-0 Aston Villa - Stina Blackstenius scores first-half hat-trick, Frida Maanum also on target for Gunners
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Man City face Chelsea in other semi-final on Thursday
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Ciara Fleming
Arsenal 4-0 Aston Villa
Free kick to Arsenal out wide near the left touchline.
Sara Mayling's frustrations get the better of her and she shoves Steph Catley to the floor once the ball is gone.
Arsenal 4-0 Aston Villa
Caitlin Foord is straight into the action, combining with Australia teammate Kyra Cooney-Cross down the right hand side.
She launches a cross into the middle of the box but former Gunner Jordan Nobbs whacks the ball clear for Villa.
Arsenal 4-0 Aston Villa
Those Arsenal changes will now take place.
Leah Williamson's return to the side lasts just over an hour as she is subbed alongside Beth Mead.
Laia Codina and Caitlin Foord come on to replace them.
Arsenal 4-0 Aston Villa
Gilly Flaherty
Former Arsenal and England defender on BBC Sport
That's what Ebony Salmon offers. She's already made the run so Maz Pacheco can go first time round the corner. A very direct player but it's great defending there from Arsenal.
Arsenal 4-0 Aston Villa
Promising attack from Villa.
Ebony Salmon darts in behind Leah Williamson, but her centre half partner Lotte Wubben-Moy is on hand to intercept the danger before the Villa forward can fire a shot towards goal.
Arsenal 4-0 Aston Villa
Just over half an hour left to play at Meadow Park and despite some fleeting moments of creativity in this second half, Aston Villa have yet to truly test Manuela Zinsberger in the Arsenal goal.
Indeed after 61 minutes they are yet to register a single shot on target.
Arsenal 4-0 Aston Villa
Arsenal look to be preparing a few changes of their own.
Caitlin Foord and Laia Codina are receiving some final instructions in the home dugout.
Arsenal 4-0 Aston Villa
Great defending from Katie McCabe!
Aston Villa break forward through Jordan Nobbs, she finds Ebony Salmon, who fires a low cross into the six yard box, but the Republic of Ireland captain slides in to deflect the ball over her own crossbar.
Villa so close to grabbing a goal back there.
Arsenal 4-0 Aston Villa
Gilly Flaherty
Former Arsenal and England defender on BBC Sport
With Jonas he will be encouraging Arsenal to go and get more and more. It will give them the confidence to bring that into the league because goal difference is huge. They will see tonight as a chance to be ruthless and rack up the numbers.
Arsenal 4-0 Aston Villa
Almost a fifth for Arsenal!
Beth Mead swings a wicked ball into the box from the right hand side. Rachel Corsie clears ahead of Alessia Russo, and the ball falls to Stina Blackstenius mere yards out.
It seems as though the Swede will tap in for her fourth but the ball bounces off her foot and over the bar instead.
Arsenal 4-0 Aston Villa
Gilly Flaherty
Former Arsenal and England defender on BBC Sport
It's hard to see from that angle whether that's off or on. I think she knew it was going to be flagged offside but again we are seeing Arsenal punish Villa in the wide areas.
Arsenal 4-0 Aston Villa
Frida Maanum with another chance to get her second goal of the game.
She jinks around two Villa defenders and into the box, but the quality of her shot doesn't match the run, and Anna Leat catches it comfortably in front of the Villa net.
Arsenal 4-0 Aston Villa
Another dangerous break forward from hat-trick hero Stina Blackstenius.
She tries to break past Dan Turner into the box but the Villa defender is wise to it and clears the ball out for a throw in.
Arsenal 4-0 Aston Villa
Frida Maanum has the ball in the net for the second time this evening, but her effort will not count.
She latches onto the end of a shot across goal, tapping in at the back post, but the official on the far side has the flag up.
The score stays at 4-0.
Arsenal 4-0 Aston Villa
Frida Maanum latches onto a through ball from Alessia Russo and breaks down the right.
The Norwegian reaches the by line and gets a cross into the box, but Villa keeper Anna Leat gathers at the front post.
Arsenal 4-0 Aston Villa
Gilly Flaherty
Former Arsenal and England defender on BBC Sport
It's one of those where you won't stand and say the game is done and dusted. No manager is going to do that. But it's about giving a good account of yourselves and playing for pride now. It's a cliché, but go in to win the second half. You're 4-0 down against one of the best teams in the country and they are on it from minute one. It's difficult. If you can nick a goal and keep it at four then that will be seen as a sort of positive.
Arsenal 4-0 Aston Villa
Off we go again for the second half.
Can Aston Villa restore some pride and get themselves on the scoresheet in this next 45 minutes?
HT: Arsenal 4-0 Aston Villa
Aston Villa have decided to make another change at the break.
Simone Magill replaces Alisha Lehmann for the second half.
HT: Arsenal 4-0 Aston Villa
Given Aston Villa have conceded 12 more goals than they have scored in the Women's Super League this season, perhaps it is no surprise that their defensive struggles have been their undoing yet again this evening.
The real surprise tonight has been Arsenal's efficiency in front of goal. Manager Jonas Eidevall has made numerous calls throughout the campaign for his side to be more clinical.
Villa felt the full force of the Gunners' attacking might in the opening 45 minutes.
HT: Arsenal 4-0 Aston Villa
The first-half stats make grim reading for Aston Villa...