Firstly, Leon Balogun headed against the bar for Brighton...

We've had two efforts hit the crossbar in the first half. Those clips incoming...

This was the most controversial moment of the first half. Florin Andone got away with one.

Liam Rosenior
Former Brighton player on BBC One at The Hawthorns

West Brom’s system has great rewards when you get it right but it also carries huge risks.

Most of Brighton’s chances have come from the full backs getting forward behind West Brom’s attackers and firing in dangerous crosses.

Image source, BBC Sport

There's been plenty of goalmouth action.

We just need a goal.

Jason Roberts
Former West Brom striker on BBC One at The Hawthorns

We’ve seen two teams commit to attacking football. Tactically it’s been really interesting – West Brom have been so expansive and that’s offered plenty of opportunities for Brighton to get forward. It’s made for a really exciting game.

It shows that Darren Moore wants to go out and win the match, pinning Brighton back to create chances.

Anthony Knockaert is causing all sorts of problems, finding spaces and showing real Premier League quality. Brighton will be disappointed not to be ahead with all the chances they have created.

There is no doubt in my mind that Andone’s elbow was a sending off. Brighton are extremely lucky not to be down to ten men.

Image source, .

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Kevin Kilbane
Former Republic of Ireland winger on BBC One

I thought the chance had gone but that would have been a bit special from Hal Robson-Kanu. Excellent technique and he is so unlucky to see his volley hit the crossbar.

That might even have topped his goal for Wales in the Euros against Belgium if it had flown in.

The ball is in the West Brom net, but Florin Andone's well-placed header is rightly ruled out for offside.

Image source, Rex Features

That is a great strike and now both sides have had an effort bounce off the bar. Hal Robson-Kanu is 22 yards out and catches a volley sweetly on the left peg, it is dipping and swerving, but not enough as it hits the woodwork and away.

Kevin Kilbane
Former Republic of Ireland winger on BBC One

Jake Livermore has been the link man so far for West Brom. He's shown some nice touches, some lovely distribution and is the key man for them between defence and attack.

Robert T Bruce: Brighton should be 2-0 up by now.

Mark O'Meara: Brighton should be ahead here. Lacking a decent finish.

It's getting better. Another chance for Brighton. Florin Andone, who should be off the pitch, cuts across goal, but just gets his angles wrong as the ball goes just wide. A good spell this for Brighton.

Another clip from earlier on. This was another fine save from Jonathan Bond in the West Brom goal to deny Yves Bissouma.

Kevin Kilbane
Former Republic of Ireland winger on BBC One

Leon Balogun has to score there. It's a free header, four yards out from another dangerous Anthony Knockaert corner but he's hit the bar. Head it down!

Brighton should be in front.

So close to 1-0. From the resulting corner, Brighton's Leon Balogun heads against the crossbar, before Alireza Jahanbakhsh shoots narrowly over the top.

It needs a goal, and we nearly got it. Viktor Gyokeres shoots and forces a fine save from Jonathan Bond with Florin Andone's follow-up effort deflected over.

Gary Flintoff
BBC Radio 5 live reporter at The Hawthorns

This game needs a goal. It would not surprise me if some of the home faithful slope off for a half-time pie and pint 10 minutes early. The magic of the FA Cup is sadly lacking at The Hawthorns tonight.

Kevin Kilbane
Former Republic of Ireland winger on BBC One

If the referee sees that elbow from Andone, he would have had to send him off.