Around 15 minutes or so to go here and it's still anyone's guess as to which of these teams is advancing to the final four.

Wieke Kaptein produces a good cross from the right in her first involvement since coming on, but Lize Kop is wise to it and comes off her line to quell the danger for Spurs.

Surprised James has come off given she is one of those special players that can produce a moment of magic.

That said she's really not had much joy in this second half.

Two more changes for Chelsea too as Lauren James and Sjoeke Nusken make way for Sandy Baltimore and Wieke Kaptein.

Time for Tottenham to shuffle the pack as Martin Ho opts for a double change.

On: Ella Morris and Olivia Holdt

Off: Evaliina Summanen and Hanna Wijk

The pattern of this game is mirroring much of what we've seen of late from Chelsea.

They're creating chance after chance but aren't putting them away, and it's giving Tottenham more and more confidence.

Add in Hampton's error and they could well end up throwing away this cup tie which they've largely dominated.

Nia Jones
Former Wales international on Channel 4

To her standards, Ellie Carpenter has had a really quiet game. Something Spurs did really well was block the crosses, Carpenter has to hit the target from there.

It's end to end stuff now with both teams going all out for a second goal.

Ellie Carpenter should really do better with a back post header for Chelsea, before Cathinka Tandberg tests blues keeper Hannah Hampton with a potshot from the edge of the area.

Bizarre stuff in the Chelsea back line as Hannah Hampton comes racing out of her goal to clear a speculative long ball and gets into all sorts of bother with Kadeisha Buchanan.

In the end Cathinka Tandberg gets in between them both to loft it towards the net but rolls the wrong side of the left post.

Image source, Getty Images

Sonia Bompastor is the first of the two managers to make use of their bench, bringing on Veerle Buurman for Niamh Charles at left-back.

Another Tottenham effort from range as Amanda Nilden takes aim, but Hannah Hampton deals with it this time.

It's been a breathless few minutes.

Lauren James and Alyssa Thompson have both been left scratching their heads as Toko Koga appears on the goalline twice to keep Spurs level.

Oh dear.

Tottenham almost return the favour with a calamity of their own as Amanda Nilden's sloppy back pass allows Sam Kerr to steal the ball in the box.

Thankfully for the visitors Lize Kop is sharp off her line with a sprawling save.

Nia Jones
Former Wales international on Channel 4

We said it was a beautiful sunny day, there are a couple of players on the pitch who will be fuming when they see it before kick-off and it's the goalkeeper.

Hannah Hampton totally misjudges the ball in, doesn't read the flight of it at all and won't want to watch that one back.

Wide free-kick to Tottenham after Kadeisha Buchanan shoves Matilda Vinberg to the floor on the far side.

The TV cameras have just panned to Spurs boss Martin Ho in deep discussion with his number two.

They're still well in this tie at only a goal down. Now it's just a question of being brave.

Kadeisha Buchanan has the ball nicked off her toes by Cathinka Tandberg and wants a free-kick.

She doesn't get it and Chelsea are very nearly punished, with Tandberg setting up Bethany England who tests the gloves of Hannah Hampton.

Back under way at Kingsmeadow.

No changes from either side at the break.