FT: Hull FC 20-10 Wigan - Tevita Satae scores twice as Black and Whites reach last four
FT: Castleford 19-18 Salford - Gareth O'Brien drop-goal in extra time takes Tigers through
Semi-final draw: Hull FC v St Helens, Castleford v Warrington
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Castleford 12-12 Salford
Blimey Castleford look so dangerous when they get the ball and Danny Richardson puts in a fantastic kick to Michael Shenton.
He's within touching distance of touching down for a certain try but Ken Sio puts in an incredible try-saving tackle to stop him.
Castleford 12-12 Salford
Peter Mata'utia thinks he's stripped the ball and won possession from Salford's Rhys Williams but Salford survive as they keep possession.
They're just behind halfway as it stands with a set of six to play with and Williams gets back onto it and it takes three Cas players to bring him down.
Sensational stuff.
Castleford 12-12 Salford
Jake Trueman puts in a pretty tame kick at the end of what had been a promising attack for Castleford in the early stages of this second half against Salford.
The Red Devils send a kick upfield at the end of the set of six that follows and they do well to keep Cas penned back.
Castleford 12-12 Salford
We're back under way at Headingley for what has shaped up to be a cracker of a Challenge Cup tie.
A huge 40 minutes awaits.
HT: Castleford 12-12 Salford
If you missed the earlier Challenge Cup quarter-final tie don't worry, we've got you covered.
Watch highlights as Hull FC beat Wigan Warriors 20-10 at Headingley earlier today.
Watch highlights as Hull FC beat Wigan Warriors 20-10 to reach the semi-finals of the Challenge Cup.
Read MoreHT: Castleford 12-12 Salford
Jamie Peacock has completed the Challenge Cup semi-final draw live on ³ÉÈË¿ìÊÖ Two and here's the line up.
Both matches to be played on Saturday, 5 June, in a triple header along with the Women's Challenge Cup final.
HT: Castleford 12-12 Salford
Big news to bring you this evening.
³ÉÈË¿ìÊÖ Two will broadcast the final of rugby league's Women's Challenge Cup live for the first time next month.
You can read more about that here.
³ÉÈË¿ìÊÖ Two will broadcast the final of rugby league's Women's Challenge Cup live for the first time next month.
Read MoreHT: Castleford 12-12 Salford
A reminder that the draw for the Challenge Cup semi-finals will be taking place live on ³ÉÈË¿ìÊÖ Two in just a moment.
Here are the draw numbers to look out for:
1) Warrington Wolves
2) St Helens
3) Hull FC
4) Castleford Tigers or Salford Red Devils
Castleford 12-12 Salford
A thrilling first half and shaping up for a cracking second 40 minutes.
A much better match than the earlier tie already.
Peter Mata'utia, goal Danny Richardson
Jordan Turner races on to a loose ball in the corner as Salford are pegged back soon after their second try.
It's not given on field and it goes upstairs and the consensus is that it's no try as Turner couldn't quite ground the ball.
However at the restart, Peter Mata'utia gets Castleford back within two! Danny Richardson levels it soon after.
Harvey Livett, goal Harvey Livett
Harvey Livett is an immense player and he's proving his worth to Salford with a sensational second try against Castleford.
He works on to James Greenwood's offload and powers his way through almost untouched.
Livett converts once more.
Castleford 6-6 Salford
Castleford have what looks like a tremendous turn and ground from Liam Watts but there's a stunning try-saver from Danny Addy and Tui Lolohea.
In the end, it's Addy's foot which stops Watts from grounding the ball successfully. Stunning last-ditch stuff.
Castleford 6-6 Salford
A finely-poised quarter-final if I've ever seen one with two very evenly matched sides battling it out here.
Harvey Livett concedes a penalty just past halfway with a rash high tackle. A rare error in this match.
Daniel Smith, goal Danny Richardson
What a response from Castleford who've been under a fair bit of pressure from Salford for the entirety of this half.
Daniel Smith powers his way towards the line and under the posts and it's sent upstairs but it's correctly given. Great stuff.
Danny Richardson has the easiest kick in the world to add the two.
Castleford 0-6 Salford
Danny Addy looks to dart his way through having seen a gap in Castleford's defence as they desperately try to hold Salford up.
He almost succeeds but Cas steal the ball in the process inches before he manages to touch down over the line.
Castleford 0-6 Salford
Salford are in the ascendancy now and are well and truly camped in Castleford's 10.
Kevin Brown sends another grubber kick through and Oli Holmes is forced to knock the ball dead.
Sensational stuff from Salford.
Castleford 0-6 Salford
Kevin Brown is having a fine old game for Salford as the veteran set up their first try and he's battering his way through the Castleford back line as they attack.
Tui Lolohea on the last puts a lovely kick in to goal and James Greenwood forces Peter Mata'utia into a goal line drop out.
Castleford 0-6 Salford
Robbie Hunter-Paul
Former New Zealand international on ³ÉÈË¿ìÊÖ Two
Salford were under the pump for the first few minutes of the game but kept complete calmness in their game.
They didn't try to push the pass and they were happy to bang away in the middle of the park and draw energy out of the Castleford forward pack.
Harvey Livett, goal Harvey Livett
Great stuff from Salford as Kevin Brown sends a high kick in towards goal and it takes a wicked bounce which has Castleford fooled.
As it goes to ground, Harvey Livett dives onto it and grounds it but referee Ben Thaler takes it upstairs and, after numerous replays and angles, it's given.
Livett adds the two.
Castleford 0-0 Salford
A good ball game here, with both sides putting some decent kicking in up and down the field, putting to shame the earlier Hull FC v Wigan tie.
Almost a quarter of an hour gone and it's shaping up to be a competitive tie with two teams going at each other in these early stages.