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Walsall are 11th in League Two, while Leicester sit 14th in Premier League
Walsall's best FA Cup runs have seen them reach round five, last in 2002–03
Leicester won the competition for the first time in 2021
Harry Clifton
YES, YES THEY CAN!
Luton went to absolute sleep from the restart and Grimsby level within 60 seconds, Harry Clifton gets on the end of a cross before prodding a shot with his toe underneath Ethan Horvath to spark wild scenes among the visiting fans, and their haddocks.
What a tie this is turning into...
Southampton 2-1 Blackpool
Jo Tessem
Ex-Southampton player on BBC Radio Solent
Southampton lost the ball and it was driven forward.
Charlie Patino slotted it in nicely. Right in the corner. It was far too easy. Willy Caballero had no chance.
Ipswich 0-0 Burnley
A clear sign of intent to win the game from both managers.
Ipswich's Kieran McKenna summons his first choice attack off the bench in Freddie Ladapo, Conor Chaplin and Nathan Broadhead.
Vincent Kompany sends for Josh Brownhill, Josh Cullen and Anass Zaroury to bolster his Burnley side.
Jordan Clark
The home side have completed the turnaround as Jordan Clark, Luton's standout player on the day, firing in a volley which had too much pace for Max Crocombe who got a hand to it but couldn't prevent it going in.
Can Grimsby find a response?
Charlie Patino
Hello!
Blackpool are back in it as Charlie Patino, the 19-year-old on loan from Arsenal, shows why he is rated by so many.
Smart finish by the teenager from inside the box and the Championship side have hope.
Fulham 1-1 Sunderland
Having got their equaliser, Fulham send on top scorer Aleksandar Mitrovic.
There are boos for the former Newcastle player from the travelling support.
Sheff Wed 0-1 Fleetwood
Sheffield Wednesday manager Darren Moore calls for the cavalry with a triple switch. Lee Gregory, George Byers and the little magician Barry Bannan are sent on to try and retrieve the situation.
Fulham 1-1 Sunderland
Don Hutchison
Ex-Liverpool midfielder on BBC Radio 5 Live
Brilliant individual goal from Tom Cairney.
For the first time, Fulham have produced a good passing move. Kurzawa finds Cairney. Sunderland defenders are diving in, desperate to block, he switches onto his left and finds the bottom corner.
Blackburn 2-1 Birmingham
More chances in this one.
Reda Khadra almost has his second of the day and a leveller for Blues, but for a Thomas Kaminski save.
Then Ben Brereton Diaz has a chance to settle it, but he lifts his effort over the goalkeeper but wide of the near post.
Southampton 2-0 Blackpool
Jo Tessem
Ex-Southampton player on BBC Radio Solent
That goal should kill the game. Romain Perraud smashes it in with his left foot. It's a good finish.
Tom Cairney
Marco Silva demanded more from Fulham and he's got it!
It's individual magic from Tom Cairney who sits down two defenders with quick feet before finding the back of the net.
Sunderland's missed chances have indeed come back to bite them.
Image source, Getty ImagesIpswich 0-0 Burnley
Burnley are getting agitated.
Charlie Taylor and now Scott Twine have reacted angrily to things going against them. That is a good sign that Ipswich are causing them plenty of problems in this cup tie.
Fulham 0-1 Sunderland
Marco Silva is furiously berating his Fulham players on the touchline. He's demanding more from them.
Romain Perraud
Another tidy finish by Romain Perraud!
The French full-back gets his second of the game after tucking past Chris Maxwell from an angle.
Surely the Saints are heading into the fifth round.
Fulham 0-1 Sunderland
Don Hutchison
Ex-Liverpool midfielder on BBC Radio 5 Live
Amazing run by Patrick Roberts.
Amad took one or two defenders away, allowing him to shoot. Only a foot away from the bottom corner.
The close control from Roberts and Amad has been top class.
Fulham 0-1 Sunderland
Another chance goes begging for Sunderland as Patrick Roberts puts a an effort from 18 yards wide.
Manager Tony Mowbray has his hands on his head. Sunderland could easily be two or three up.
Blackburn 2-1 Birmingham
Nearly a third for Blackburn as Ben Brereton Diaz is denied by Neil Etheridge.
It looks like there are still more goals to be had at Ewood Park.
Bristol City 3-0 West Brom
Carlos Corberan is a man of action... most of those actions have been punching the air in frustration thus far this afternoon but now he's made a triple substitution.
On come Brandon Thomas-Asante for Daryl Dike, Taylor Gardner-Hickman for Jason Molumby and Grady Diangana for Tom Rogic.
Albion drew 3-3 late-on in the previous round and will need some similar fireworks here.
Southampton 1-0 Blackpool
How are Blackpool not level?
Southampton are caught out at the back and Ian Poveda tries to lift it over Willy Caballero who saves. The ball falls for the Blackpool player to have another go but he puts it wide.
The Seasiders should be level.
Fulham 0-1 Sunderland
This is a great game now. Fulham break in a flash from defending their own corner with Harry Wilson through on goal. Black Cats keeper Anthony Patterson stands tall to deny the Wales international, however.