I can't call this.
Both sides look dangerous in possession.
Warrington 14-12 St Helens
Sharon Shortle
BBC Sport commentator on BBC Two
There is just two points between these two teams, it's so close.
The more we play, the more the fans in the ground will keep looking at the clock.
Warrington 14-12 St Helens
Robbie Hunter-Paul
Former New Zealand international on BBC Two
Warrington's defence has been so good today
Every time St Helens have got on the attack they have got their line back superbly.
Warrington 14-12 St Helens
I'm not really sure how to summarise this game.
The first half was two teams methodically keeping their cards close to their chest.
The second half has been riddled with errors.
Great entertainment for the neutral, this.
Warrington 14-12 St Helens
Jonathan Davies
Former Warrington and Great Britain international on BBC Two
Warrington haven't really covered the long kicks well.
The backs have not communicated well at all.
Warrington 14-12 St Helens
Matty Ashton AGAIN makes a crossfield run from deep inside his own half and is AGAIN brought down by St Helens full-back Jack Welsby.
My word.
Warrington 14-12 St Helens
Anyone fancy a tasty 20 minutes of rugby league?
Stay tuned.
Daryl Clark, goal Jon Bennison
Image source, PA MediaSo, here's what happened.
St Helens make a last-ditch kick from wide and it's knocked on from Warrington.
The loose ball spins on its end, Saints regain possession with it then being zero tackle and they feed Daryl Clark to touch down through the posts.
As Sharon says, that was a bit of a mess from Warrington. And St Helens have propered.
Jon Bennison adds the two and it's a two-point game.
Warrington 14-6 St Helens
Sharon Shortle
BBC Sport commentator on BBC Two
It is a mess by Warrington!
The referee will want to check and see how the ball came out.
Warrington 14-6 St Helens
St Helens are over through Daryl Clark!
But will it be given?! We're going upstairs to video referee Tom Grant again.
Warrington 14-6 St Helens
Robbie Hunter-Paul
Former New Zealand international on BBC Two
Right now it's time for St Helens to up the tempo of the game.
They're chasing the match now and I believe this is when they're at their most dangerous.
It is far from over, we know what the Challenge Cup can be like, it's a special competition.
Warrington 14-6 St Helens
Sharon Shortle
BBC Sport commentator on BBC Two
We talk about big moments
That could be a big one for the Wolves!
Ben Currie, goal Marc Sneyd
Image source, SWPix.comSt Helens' 18th man James Bell puts in a sensational ankle tap in on Warrington captain George Williams to bring him down as he squeezes out of a tackle.
But Warrington keep the attack alive, feed the ball to Ben Currie through a fantastic kick from Williams, leading him through to score their second try.
Massive.
Marc Sneyd nails the extras and this is well and truly advantage Warrington. St Helens need a response. And now.
Warrington 8-6 St Helens
Robbie Hunter-Paul
Former New Zealand international on BBC Two
One mistake and one moment of magic, that's all that could dictate this game.
This match is on a knife-edge.
Warrington 8-6 St Helens
Jonathan Davies
Former Warrington and Great Britain international on BBC Two
There are so many mistakes at the moment, you'd think it was raining!
Warrington 8-6 St Helens
Deary me, Matty Ashton is played clean through again.
He races to the corner but the in the build-up is forward. Not that it matters as St Helens hold him up before he can ground.
Warrington 8-6 St Helens
We've got the first captain's challenge of the afternoon.
Warrington's Rodrick Tai is judged to have knocked on but the Wire challenge the call.
We go back upstairs and it's judged that there's a slight pull on the ball from a St Helens hand and the challenge is successful.
That's a controversial call.
Warrington 8-6 St Helens
Image source, PA MediaSt Helens race to the line but Joe Batchelor clearly loses possession as he's smothered by Warrington before he can get down to the line.
Despite this we have another look upstairs. Still the same. No try, clear as day.
Warrington 8-6 St Helens
Robbie Hunter-Paul
Former New Zealand international on BBC Two
I don't mind the confidence by Ashton to take his man on but it really has to result in a try.
Warrington 8-6 St Helens
Jonathan Davies
Former Warrington and Great Britain international on BBC Two
Great play by Matty Ashton but he absolutely blew that, blew it!
He has to it to Dufty.