Regan Grace's hat-trick sees St Helens overcome a dogged Huddersfield and secure their Challenge Cup semi-final place.

And so the first two fixtures of this season's Challenge Cup quarter-finals comes to an end and we've got our first semi-finallists.

Warrington Wolves and St Helens fought their way through to the last four and just 80 minutes away from Wembley.

We've got two more quarter-final ties to bring you live on the BBC tomorrow and I'll be taking you through it all through the medium of the live text.

I hope to see you there. For now, thank you for joining us.

St Helens boss Kristian Woolf told Sky Sports:

"I'm happy with the win and the way we fought out the second half. We lost some players in the first half and we had to work hard in the second half.

"I'm not sure on Tommy Makinson. He's injured it really early. We're lucky we had Jack Welsby on the bench. We'll have a look at it. It wasn't too soon for him to come back, he's done plenty of training and he could have played last week.

"It was great to have Regan Grace back to his form. He's been quiet the past few weeks but every time he had the ball he looked like he could create something."

Huddersfield Giants head coach Ian Watson told Sky Sports:

"We were playing the right way and absorbing the pressure but we were undone by some Jonny Lomax passes toward the end of the game.

"The first halves have been our Achilles heel but we rectified that in the second half.

"We've set some standards against St Helens and shown we can compete at the highest level."

St Helens winger Regan Grace told Sky Sports:

"It was an immense game. The intensity was there from start to finish It was a perfect game to watch as a fan because both teams were in it right until the end.

"We knew from the start we were in for a tough game. We went behind but we knew if we worked hard we could get back on top of things.

"It's nice to be scoring again. It's off the back of the boys' hard work."

The hooter is sounded and St Helens go through to the semi-finals of the Challenge Cup as they beat a well-drilled Huddersfield Giants at Headingley.

Credit to Ian Watson's side, who gave Saints a proper game of things, but a Regan Grace masterclass helps St Helens through.

What a kick from Theo Fages. The St Helens man sends a high kick in towards touch and Lee Gaskell picks it up for Huddersfield.

However Saints wrestle him in to touch and regain possession. That may well have won them the match.

Deary me. On the fifth James Roby offloads to Lachlan Coote who spills the ball and neutralises St Helens' attack.

Then just as Huddersfield break, Kyle Amor concedes a needless penalty to the Giants for a high tackle.

My word.

Huddersfield concede a penalty to St Helens for dissent just moments after scoring an emphatic try to claw themselves to within a point of their opponents.

Silly stuff and hands Saints a massive advantage with the game winding down.

Lachlan Coote gets the ball down for St Helens but it's not given.

Mark Percival wrongfoots Jermaine McGillvary in the build-up but the Huddersfield man gets a fingertip to the ball and forces Percival into knocking on before Coote can get onto it.

A let off for Huddersfield, with St Helens looking up for this despite their seven-point lead.

Theo Fages nails a drop-goal for St Helens right in front of the posts to bolster their lead against Huddersfield.

The Giants will need at least two scores now to go through to the semi-final.

Jack Welsby spills the ball after an offload from his St Helens teammate Jonny Lomax.

A rare error from the young Saints lad but he'll be pleased with his side's performance after the break.

It's all St Helens right now but Huddersfield aren't sitting back with 20 minutes to go.

Huddersfield look to respond soon after Regan Grace's second try and, on the last, they put a desperate kick in to goal but they can't quite work onto it.

How the tables turn. Now it's St Helens who are resolutely defending.

A cracking cup tie this.

Dear oh dear, that's a let off for Huddersfield as they manage to tackle Jonny Lomax before he can offload for what surely would have been St Helens' latest try.

However there's another stoppage in play as Jack Welsby picks up a knock as Saints try to dart to the line.

TV replays show he might have got his ankle caught in the midst of a tackle but he's cleared to play on.

It's worth pointing out here that Huddersfield boss Ian Watson led his former club Salford Red Devils to last season's Challenge Cup final.

The Giants have suffered some inconsistent form this season under Watson, but they look reinvigorated tonight and have given St Helens a proper game tonight.

That being said, they concede a goal line drop out under severe Saints pressure. It ain't over yet, folks.

Lee Gaskell catches a high ball for Huddersfield but just before they can celebrate, Mark Percival puts a cracker of a steal in to regain possession for St Helens.

Saints then win a penalty within kicking range and they go for the two. Lachlan Coote makes no mistake with the boot and squares this match up at 12-12.

Sione Mata'utia almost grounds the ball down in the corner for St Helens as they come storming out of the blocks in this second half.

He's well held up by Huddersfield and Saints are forced to work another attempt, but this time Mark Percival knocks on in the process.