Image source, PA Media

In the aftermath of that frantic 30 seconds or so, Warrington win a penalty.

Marc Sneyd stands over it and, as expected, successfully sends it through the posts.

Warrington have a two-point lead, but should it have been at least four, or six?

Wow. Matty Ashton spins out of a tackle and runs almost the length of the field before he's eventually brought down by a try-saving tackle by Jack Welsby.

In all honesty Ashton should have easily been able to run in from there.

Warrington have the tackles still in numbers and are camped in Saints' 10 but eventually the visitors break on the counter before play is stopped for offside.

Jonathan Davies
Former Warrington and Great Britain international on BBC Two

It is seriously warm down there, very hot.

St Helens' George Delaney cheaply knocks on as he attempts to roll the ball behind him.

Jeers ring around from the Warrington supporters. Their side win a valuable set around halfway.

Some injury news for you.

St Helens' Mark Percival has failed his HIA (head assessment injury) and will play no further part today. As such, Saints have activated their 18th man, meaning James Bell is available.

Meanwhile, Warrington are hopeful Paul Vaughan will be able to return despite his nasty-looking finger injury.

We are back under way at the Halliwell Jones Stadium.

The players are coming back out and the second half is about to begin.

It's finely poised as things stand. Who do you think will go through to face Leigh Leopards next month?

Let us know your thoughts using #bbcrl

Here's how the men's Challenge Cup semi-finals look:

• Hull KR v Catalans Dragons
• Warrington Wolves OR St Helens v Leigh Leopards

Image source, SWPix.com

Right then, it's time for the men's Challenge Cup semi-final draw.

What ties can we expect in the final four?

We're about to find out as the draw takes place at the side of the pitch.

Former England football captain - and Warrington fan - Stuart Pearce will be drawing some numbers alongside BBC pundit Jon Wilkin.

Elliot Minchella
Hull KR lock

For me I think St Helens will be going in the happier

It's been a great first half, Saints are in control of where this second half goes.

I think if they tighten up with the mistakes then they can have a huge say in what happens.

Sharon Shortle
BBC Sport commentator on BBC Two

There are some huge hits going in.

Neither side is willing to give an inch.

Image source, PA Media

A stunning half of rugby league if you ask me.

All square, plenty going on at either end, two teams at their absolute peak and entertainment in spades.

Tristan Sailor's quick thinking has neutralised Matt Dufty's earlier try for the Wire.

A big second half awaits. Can St Helens pick up where they left off after that end to the first half?

Jonathan Davies
Former Warrington and Great Britain international on BBC Two

I think Warrington will be disappointed with some of their final play so far.

That being said has been a ferocious encounter and the hits are flying in now.

Jonathan Davies has just described this game as ferocious during our commentary on BBC Two.

I think that's about the right sort of word.

Some huge hits and some immense defensive work going on so far.

Sharon Shortle
BBC Sport commentator on BBC Two

No surprise with Wingfield failing the HIA.

He did not look great, he was out cold on the pitch.

St Helens interchange Jake Wingfield, unsurprisingly, has failed his head injury assessment and won't play any further part in today's game.

Another blow for Saints.

Robbie Hunter-Paul
Former New Zealand international on BBC Two

Image source, PA Media

There's been a couple of times Warrington have looked a little messy on the attack.

They need someone like George Williams to take the game by the scruff of the neck and say I'm going to score a try myself.

The St Helens defence is doing well so far.

St Helens' Mark Percival does indeed come off for a head injury assessment.

He doesn't look too good in all honesty.

Daryl Clark comes on in his place for the time being, and receives some boos, having previously played for Warrington.

Aaron Lindop tries to spin and collect a loose ball as Warrington work the ball wide to try and force their second try against St Helens.

He collects it alright, but spills it and knocks on moments later.

In the aftermath it looks like Saints' Mark Percival's taken a bit of a hit in the build-up. Dazed, he's marched to the sidelines as well. It's been a heavy hitting half for the visitors.

Should he come off for a HIA, that'll be the third assessment of the half for a battered and bruised St Helens.