BBC One

Righto, as one game looks set for extra-time, another one is about to get under way.

We're live on BBC One, BBC iPlayer, BBC Sport website & app in two minutes time for Premier League Brighton against League Two Grimsby.

BBC Radio 5 Sports Extra also has commentary with Conor McNamara and Stephen Kelly.

And of course, highlights from this tie will be dropped right here into our live text.

Sheffield United come forward again, James McAtee driving forward before slipping the ball to Billy Sharp, but he is just offside.

Jayden Bogle is on for George Baldock, a like for like swap at full back for the hosts.

It is all Sheffield United now with Blackburn hanging on and hoping for extra time. Tommy Doyle has a go from distance but straight down Aynsley Pears' throat.

John Dunthorne: Big mistake by Rovers to change shape now.

Michael Brown
Former Manchester City midfielder for BBC Radio 5 Live

Incredible.

That is the difference from Oli McBurnie.

The Kop behind the goal go crazy. Game on.

Image source, Getty Images

The problem for Blackburn boss Jon Dahl Tomasson is that he made the tactical switch to be more defensive. Now Blackburn need to attack again but the home side have the crowd and the momentum behind them.

Blackburn have switched to a back five to try and see out this final 10 minutes.

Sheffield United, though, have offered little since going behind, could this defensive switch play into the home side's hands?

It looks like Blackburn are going to try and shut up shop as midfielder Ryan Hedges is replaced by defender Scott Wharton.

There's also a straight swap at right back as Callum Brittain comes on for Joe Rankin-Costello.

James McAtee slips the ball in for Oli McBurnie inside the box, McBurnie shoots but well wide. Should have done better from that position.

Superb work on the left by Ben Brereton Diaz and he gets away from George Baldock, charges towards the box before crossing for Sam Gallagher but it is just out of the reach of his outstretched foot.

Michael Brown
Former Manchester City midfielder for BBC Radio 5 Live

Brilliant strike, hit so well.

Right across the line as everybody stops to watch it. Wow, what a strike.

Dominic Hyam times a tackle inside the box to perfection to halt a Sheffield United attack. There's a few shouts for a penalty but it was an excellent challenge.

The woodwork denies Blackburn a third as Ryan Hedges hits a low effort right on the edge of the box that beats Wes Foderingham but hits the inside of the post and goes across the goalmouth.

Blackburn are pushing to put this tie beyond Sheffield United.

Sheffield United turn to an old and experienced head as Billy Sharp comes on. He replaces Jack Robinson as Paul Heckingbottom adds more to his attack.

Wes Foderingham, the Sheffield United goalkeeper, is currently down receiving some treatment but eventually he is up on his feet and okay to continue.

Roberto de Zerbi makes four changes to the Brighton side that beat Crystal Palace 1-0 midweek.

Robert Sanchez returns in goal with Adam Webster, Evan Ferguson and Deniz Undav also coming into the XI as the Seagulls aim to reach just their third FA Cup semi-final.

Brighton XI: Sanchez, Gross, Dunk, Webster, Estupinan, March, Caicedo, Mac Allister, Mitoma, Ferguson, Undav.

Subs: Steele, Colwill, Welbeck, Sarmiento, Enciso, Ayari, Van Hecke, Veltman, Buonanotte.

There are also four changes for Paul Hurst's Grimsby from their 1-0 win at Sutton United last weekend.

Gavan Holohan, Anthony Glennon, Danilo Orsi and Otis Khan come in to start in the club's first FA Cup quarter-final since 1939 - when they beat Chelsea.

Grimsby XI: Crocombe, Smith, Waterfall, Maher, Efete, Green, Holohan, Glennon, Clifton, Khan, Orsi.

Subs: Battersby, Pearson, Emmanuel, McAtee, Hunt, Morris, Amos, Taylor, Khouri.

Michael Brown
Former Manchester City midfielder for BBC Radio 5 Live

There is a lot of time, but you don't want to concede on the counter. Frustration is setting in for Sheffield United.

Blackburn are just waiting, sitting in, ready to hit them.

Sheffield United have had plenty of chances in this game so you'd expect they'd get at least one more really good opportunity with 25 minutes to go.

Hayden Carter is booked for Blackburn for a foul and that's a difficult one for the defender as it means he is out of the semi-final if they progress. You can see from his reaction he knows what that means.