Goodbye
And so both teams will be in the hat for the round five draw tomorrow evening.
That wraps up our coverage of a vintage cup tie.
FT thoughts
We shouldn't overstate how much of an issue that replay will be for Liverpool. In fact, it's only really an inconvenience.
But they deserve criticism for this performance. They started well but lost any real fluency and with it, their control of the game.
Shrewsbury capitalised. They probably had the greater share of the chances. That second Cummings strike will long in the memory at Meadow Lane.
Full-time
And that's it! Shrewsbury are headed for Anfield, and the result is fully deserved.
90+4' Ooft, Shrewsbury nearly nick it! Laurent tries to catch Adrian off guard at his near post and the 'keeper has to palm behind.
Cummings misses his chance from the corner.
Should be 2-3!
90+1' Firmino and Salah combine and only one outcome looks likely. The Egyptian runs onto the clipped cross but somehow glances wide!
Liverpool go close
89' O'Leary parries Firmino's shot from the angle, and Jones is heroically thwarted by Williams as he looks to bury the rebound.
87' Love's ball-in bounces up and strikes Fabinho's swinging arm. Shrewsbury are furious, but Simon Hooper only blows for a subsequent offside.
It would have been harsh on the Brazilian.
Shrewsbury penalty appeals!
87' Love's ball-in bounces up and strikes Fabinho's swinging arm. Shrewsbury are furious, but Simon Hooper only blows for a subsequent offside.
It would have been harsh on the Brazilian.
Changes for both teams
85' Whalley off, Udoh on in Shrewsbury's final switch.
Firmino swapped for Minamino simultaneously.
84' The League One team look the more likely.
83' Brief Shrewsbury appeals for a penalty as Williams nudges Cummings down, but the flag was up.
83' And Firmino is also going to enter the fray momentarily.
On comes Salah
80' It's a very attacking change. Matip off, Salah on. Fabinho drops into defence.
79' No more half-measures from Klopp. Mo Salah is getting ready...
78' Origi laces the ball into the side-netting at the other end.
A careless Liverpool are confronting the possibility of an unwanted replay, or worse.
76' Cummings gets in between Lovren and Williams and produces an accomplished low finish to beat Adrian. What a finish we have on our hands now.
GOOOAALLL! Shrewsbury 2-2 Liverpool
76' And unbelievably, Shrewsbury have come back to level it! Cummings at the double!
75' Origi sets himself up for a powerful long shot, which O'Leary saves well.
Liverpool sub
72' Harvey Elliott didn't shine quite as bright today as he has in previous outings. Jurgen Klopp turns to Alex Oxlade-Chamberlain as he looks for a goal to kill the game off.
68' And now the home fans believe again. Liverpool would have been expected to shut things down at 2-0 but Shrewsbury have been doing all the probing.
GOAL! Shrewsbury 1-2 Liverpool
65' Cummings sends Adrian the wrong way from 12 yards.
Replays show that Larouci might well have got to the ball first. But Liverpool can't have too many complaints about the scoreline at this stage.
PENALTY TO SHREWSBURY
65' Now then. It's a spot-kick for Shrewsbury after Larouci's challenge on Laurent, who was racing through.
64' Liverpool, by the way, haven't really threatened since that second goal. Jurgen Klopp doesn't look pleased.
Should be 1-2
62' Liverpool are giving the League One side chances to get back into the game. Matip's loose ball out from his own box is easily intercepted by Laurent, but he fires wide.
They're letting the Reds off the hook.
60' That's Lang's last involvement. Jason Cummings, their top-scorer, is introduced.
Adrian saves!
58' It's another one-on-one chance for Shrewsbury, this time falling to Callum Lang after he peels off Lovren. He forces Adrian to get down to his right and get a strong hand to the ball.
Did that have to go in?
52' Laurent shoots wide on the swivel as Shrewsbury pounce on a weak Adrian goal-kick.
50' That goal, by the way, came less than 30 seconds into the half. Ricketts' gameplan up in smoke just like that.
48' Surely there's no way back from that? Let's see. Plenty of time left I suppose.
46' Neco Williams swings a cross into the back post, where Donald Love inadvertently connects. The ball rolls agonisingly into the net. Nobody can quite believe it.
Goal! Shrewsbury 0-2 Liverpool
Calamitous own goal. The stuff of nightmares.
Second half
Liverpool get us going again. 45 minutes from Round Five.
It looks like there'll be openings for the hosts, but they absolutely must be clinical.
If Liverpool score the next goal, you'd imagine it's game over.
And Klopp will want this settled swiftly to ensure he doesn't have to turn to the big guns he has in reserve.
After going a goal up, Liverpool looked likely to cruise to a three or four-goal victory, but Shrewsbury have responded well.
They've had to be very patient as the Premier League leaders stroked the ball around, but they've had the chances, through Whalley, to equalise.
In fact, they've probably had more clearcut opportunities than Liverpool.
The optimistic response to the whistle from the home support isn't too surprising.
HT
45+2' Liverpool don't clear it convincingly at all. It eventually falls to Pierre, who's facing away from goal, and he can't muster a clean strike.
And that's the last action of the half.
45+1' Shrewsbury are gifted a corner after Fabinho's mishit pass from the middle of the park sails behind. He looks some way off it in truth.
45' Joel Matip glances a header wide as we near the interval.
Another Shrewsbury chance
40' Or maybe Ricketts will be ruing his side's misses. It's the unmarked Whalley with the opportunity again, but his technique for the shot across goal isn't up to scratch. It bobbles wide.
39' Sam Ricketts would probably be content if it stayed like this until half-time. His team have conducted themselves well in these past 10/15 minutes.
We've just seen Minamino look to curl one with the outside of his boot but make a mess of it.
35' Liverpool's chance creation has dried up somewhat, and Shrewsbury look a little more confident. They're enjoying some improved, albeit still short, spells of possession.
31' Replays show that Shrewsbury defender Aaron Pierre may have been fortunate to escape the concession of a penalty after putting a Williams cross behind with his arm.
No VAR here today.
Shrewsbury sub
26' Shrewsbury are forced into an early change. Norburn hasn't been able to shake off that knee injury he picked up earlier. The veteran David Edwards replaces him.
26' They're certainly not going to get many chances, based on the pattern of play so far, and so you can't help but feel Sam Ricketts might be looking back at that moment post-match.
Big chance for Shrewsbury!
24' Out of absolutely nothing, Shrewsbury have a golden chance to level the match! Fabinho, who has looked rusty, loses possession in the middle, and Whalley is set racing through on goal. He sizes up Adrian and looks to apply the finish, but the 'keeper saves with his legs.
20' Shrewsbury are averaging one pass per minute so far. Virtually nothing to excite the home crowd in this first quarter of the game.
Curtis Jones has just sliced wide from distance.
20' Shrewsbury are averaging one pass per minute so far. Virtually nothing to excite the home crowd in this first quarter of the game.
Curtis Jones has just sliced wide from distance.
Brilliant vision from Chirivella to pick out Jones' run with an incisive pass. An assured finish into the far corner, and the Reds already look to be in command.
GOAL! Shrewsbury 0-1 Liverpool
15' And the visitors have the lead! Curtis Jones scores in back-to-back cup ties.
14' A whipped, Trent-esque cross from Williams is very nearly met by Minamino. A warning to Shrewsbury about the dangers of giving him space.
12' Oliver Norburn stays down after a clash of knees but he's eventually able to climb to his feet and should rejoin the action.
11' As if the magnitude of the challenge for Shrewsbury wasn't clear enough already, Liverpool are sporting the world champions badge on their red shirts.
8' Liverpool's first shot of the game comes from Origi. The ball bounces up in front of him and he looks to fire it across goal into the bottom corner from outside the area. Not too far wide.
6' It's Liverpool enjoying all the early possession, and soon they'll look to begin exerting some pressure.
3' Half-chance for Minamino as he receives a cut-back from Chirivella, but a poor first touch lets him down.
2' Shaun Whalley briefly thinks he's in behind Liverpool but the flag goes up.
Kick-off
Shrewsbury get the game underway.
... And out they come into a booming Meadow Lane.
The teams are in the tunnel. Dejan Lovren captains Liverpool today by the way...
Full time at Prenton Park and it's an emphatic 6-0 victory for Manchester United. Another big name into the Round Five draw. Liverpool will hope to progress with similar ease.
Confirmed Shrewsbury Town XI
Here's how the hosts line-up: O'Leary, Pierre, Williams, Ebanks-Landell, Love, Goss, Laurent, Norburn, Golbourne, Lang, Whalley.
Joint top-scorer Jason Cummings is on the bench, alongside Sam Hart.
Confirmed Liverpool XI
It's the kind of Liverpool line-up we anticipated. 11 changes from the win at Wolves. Fabinho, looking to regain his sharpness, starts at midfield, with Takumi Minamino, Dejan Lovren and Joel Matip also involved from the off.
Team in full: Adrian; Williams, Matip, Lovren, Larouci; Fabinho, Chirivella, Jones; Minamino, Elliott, Origi.
Naby Keita, Mohamed Salah and Roberto Firmino are included on a very strong substitutes' bench.
The game is live on BBC One in the UK, but if you're unable to watch, stick around for our blow-by-blow commentary.
We'll have the confirmed line-ups soon...
Who is already into R5?
Moments ago, holders Manchester City secured progression to the last 16 by brushing Fulham side. They join Chelsea in the hat.
Manchester United, meanwhile, are about to kick-off against Tranmere, while Arsenal are action at Bournemouth in the final tie of the round tomorrow night.
Shrewsbury team news
Shrewsbury manager Sam Ricketts has no new injury worries ahead of this one, and his squad has been boosted by the recent arrivals of Sam Hart, a Liverpool academy graduate, and Josh Vela.
Left-back Hart, incidentally, was in the same youth team as Trent Alexander-Arnold and turned out for the Reds in a pre-season friendly as recently as 2016. He could make his debut today.
Liverpool team news
The Reds will look to avoid that eventuality by mixing youth with experience. Dejan Lovren and Joel Matip could line up at centre back after recovering from injuries, while Naby Keita and Adam Lallana might return in midfield.
Divock Origi is expected to lead the line, with Rhian Brewster out on loan at Swansea City.
This is the last stage of the FA Cup where a draw in normal time will trigger a replay. From the fifth round onwards, the matches will go to extra time and penalties.
A stalemate here could prove problematic for Liverpool, with suggestions that the return fixture may have to be played during the Premier League's 'winter break' next month.
How did they get here?
Liverpool memorably prevailed against a vastly more experienced Everton side in Round Three thanks to a Curtis Jones wondergoal.
Shrewsbury, meanwhile, pulled off an upset by beating Championship side Bristol City 1-0 in a replay.
Shrewsbury and Liverpool have only ever met once before in official competition. That was back in 1996 at the same stage of the cup, with the Reds running out 4-0 winners.
Stan Collymore and Robbie Fowler were among the goals.
Liverpool eventually made all the way to the final, where they were beaten by archrivals Manchester United.
The venue
Today's game takes place at New Meadow, around 70 miles south of Anfield.
There's no doubt that all of the 9,875 seats will be filled.
A cup fairytale?
What on occasion this is for Shrewsbury, who sit 16th in the third tier. This evening they welcome the European and world champions, eyeing a truly historic result.
Liverpool have yet to reach round five under Jurgen Klopp but can inch closer to a potential treble with victory today.
I'm David Comerford and I'll be providing the key pre-match information ahead of team news at around 16.00.
Welcome
Hello and welcome to VAVEL UK's live text commentary of the FA Cup fourth-round match between Shrewsbury Town and Liverpool. Kick-off is set for 17.00 GMT.