Wigan back-rower John Bateman gets a new shirt, blood pouring from his chops. Won't stop him though.

Ben Flower (pictured) not so lucky - he's gone off and is heavily strapped up.

Image source, Reuters

Warrington's last-tackle plays are really teasing Wigan's defence. They got away with it this time though as the ball popped up to Lewis Tierney.

Now Wigan's frustrations boil over again with a Taulima Tautai knock-on. Massive chance for Wolves to press for a second try.

His first act? Give away a penalty.

Still, the England international's presence could be a settling one for Shaun Wane's side.

Image source, Rex Features

Wigan get the ball back after a sloppy passage from Warrington.

Brilliant break by Dan Sarginson, just cut down, and a cheeky kick in behind by George Williams agonisingly trickles dead.

One of the things Warrington usually do so well is vary the point of the attack with Daryl Clark, Declan Patton, Kurt Gidley and Stefan Ratchford all getting their hands on the ball... Clark has been quiet so far...

No try for Jack Hughes as he fumbles in trying to score. Wigan defend their line well there.

Image source, Getty Images

What a couple of weeks for Declan Patton. Man of the Match as Warrington won the League Leaders' Shield at Hull and a tryscorer in a Grand Final.

Kicks are really troubling Wigan, Dan Sarginson jumps for a high-ball and can only fumble. Warrington scrum in a pressure area.

Knock-on from Wigan after Tom Lineham had jammed in... Oliver Gildart tried to tip on to take advantage of the overlap but he could see the on-rushing Lineham to make the challenge.

Half-way through the half, Warrington on the attack.

Warrington get a scrum on the back of a knock-on by Wigan's Josh Charnley.

They're hammering away on the door until Ryan Atkins stooped to take in a pass and watched it slip from his fingers.

Fine margins, one-percenters...

Forward pass from Anthony Gelling means Josh Charnley's finish in the corner is to no avail.

Liam Farrell cantered through a gap - he did that last year against Leeds and fed Joe Burgess on that occasion...

...couldn't find the pass this time. Big warning shot for Warrington.

Image source, Getty Images

Wigan go close to breaking through again there with a George Williams clip over the top but the bounce beats the chasers.

Warrington again try to pen back the Warriors but their kick-returns are sharp at the moment.

Very open game - for a final particularly.

George Williams tried to slide in a grubber there for Wigan but some brilliant hands - worthy of David De Gea by Kurt Gidley shuts down the play.

Warrington kick for territory and Wigan have to bring the ball out from their own 20.

It's building up to a good game.

Wigan get to within five on the back of that 20m scrum.

The forwards are trucking the ball in hard...

Massive kick from Matty Smith on a free-play wins a 40-20 for Wigan.

Huge work. Wigan smell blood now...

Phil Cartwright
BBC Sport at Old Trafford

No surprise to see Wigan go for the two points early on, just to settle those nerves which will always be present in players, no matter how much they attempt to hide them.

The atmosphere is electric.

Matty Smith takes a gift of a two-pointer there for the Cherry and Whites.

Snaps it through the uprights from close in. Wigan lead.

Image source, Rex Features

Wigan get another penalty in front of the sticks, and they'll go for two.

First points of the game perhaps here...

Hanging kick to the right corner almsot taken in by Tom Lineham there. The big winger couldn't bring it in fully for Warrington.

Wigan have the ball and a chance to break out.

Joe Westerman gives away the first penalty for holding and Wigan pump the ball into touch.

First sight of the Wolves line for the Warriors.

Aye, it's nervy enough just watching!

Warrington were so close to the line then but that dogged Wigan defence kept them out. It's been a trademark.

Proper arm-wrestle already. Boom.