Still just under 20 minutes to go in this one after the delayed kick-off. It would be a truly stellar effort for Coventry to get something from here.

Image source, Rex Features

Josh Sims is coming on for Southampton. The winger replaces forward Guido Carrillo.

Just over FIVE minutes left for West Brom. They've come so close so many times. Can they finally dig out that equaliser?

Image source, Getty Images

David Pleat
Former Tottenham manager on BBC Radio 5 live

Super header from Leo Ulloa for the third goal. Unchallenged.

Brighton have done two things well. They have crossed the ball well and early, but their use of the cross field ball has been excellent.

Michael Appleton
Leicester City assistant manager on BBC Radio 5 live sports extra.

The second half has been end to end, which is what you'd expect from a cup tie between two Premier League sides.

West Brom have looked very dangerous in corners all afternoon - I don't know how they've not scored from one.

Image source, Reuters

So close again! Ahmed Hugazi's effort - a sliced scissor kick - loops up and against the bar.

The rebound falls to Salomon Rondon, his scuffed strike bounces up and looks to be headed in, but there is Ryan Bertrand to boom away on the line.

Hang about - Jonson Clarke-Harris hits the post! What a brilliantly inventive effort that was, technically tough to adjust and flick Tom Bayliss' low cut-back, with the outside of his foot. against the upright and away.

Jay Rodriguez battling in the corner to win his side a throw. Jonny Evans sweeps a cross in, Grzegorz Krychowiak collects the rebound but has to turn back to his own goal and build again. Slight groans from the home fans.

FIFTEEN to go for the Baggies to find an equaliser. Can they force the replay?

Image source, Reuters

A switch for Coventry - Rod McDonald replaces Jack Grimmer, who got that winner against Stoke in the third round. Looks like no big upset story today.

Nice stuff from the Baggies. Jay Rodriguez slips the ball to Matt Phillips, he turns Wesley Hoedt with ease, fires a shot over the bar.

Manolo Gabbiadini is on for Southampton - Nathan Redmond has gone off.

For the Baggies, Chris Brunt takes Gareth Barry's place.

David Pleat
Former Tottenham manager on BBC Radio 5 live

It's not easy for the Coventry defence against the new boy Jurgen Locadia and the experienced Leo Ulloa who are up front for Brighton.

Locadia will need to play well to stay in Chris Hughton's thoughts for the coming games.

Image source, Getty Images

Ah, that's a disappointing effort from Marc McNulty, hooked over the bar from just inside the box when he maybe had time to take a touch. It'd been a while since Coventry had fashioned a chance.

Another Southampton slick move comes to nought as Nathan Redmond looks to slip through Cedric Soares. The ball runs through to Ben Foster. There's a big boot up the pitch and the ball is immediately back in Saints hands.

Michael Appleton
Leicester City assistant manager on BBC Radio 5 live sports extra

West Brom are on the front foot this half, even when they went two goals down.

The next goal is crucial.

I can actually see West Brom scoring another couple.

Image source, Reuters

There's about 20 minutes for West Brom to add to Salomon Rondo's blistering finish, a goal that really brought this game back to life. The vibrancy levels have dimmed slightly over the past 5-10 minutes. Southampton looking to take back control.

Michael Appleton
Leicester City assistant manager on BBC Radio 5 live sports extra

Rondon is not renowned for his finishing, but he works hard and runs a lot.

He is a member of the team and not an individual

Image source, Getty Images

Any sign of a change-up in the shape of this tie? It still looks like Premier League v League Two. Pinball in the Coventry box and another corner to defend.

Very nice from Guido Carrillo, chest control, strength to hold off his man and then a sensible pass to a team-mate. Mauricio Pellegrino is gesturing furiously on the sidelines.