Referee James Linington gives Juninho Bacuna a bit of a telling-off.

The Blues man is treading the line between aggression and recklessness.

Meanwhile, Okay Yokuslu is penalised for a foul on Lukas Jutkiewicz just on the left hand side of the area. Another chance for Birmingham to test David Button.

Tony Brown
West Brom's all-time record goalscorer on BBC Radio WM

That's Albion's best move of the game by a mile. They moved it a lot quicker from the left to the right and caught Birmingham out for once.

Marc Albrighton with Albion's best effort so far, a first-time shot from 25 yards that would have troubled John Ruddy if not for a deflection off Auston Trusty that took it wide.

Former Villa man Albrighton would love a goal at St Andrew's, of course.

Townsend in the wars again as Juninho Bacuna has a little dig at him after the ball's gone.

Blues not giving Albion a second's peace.

Conor Townsend, with no number on his back after the change of shirt due to a head wound, tries to whip in a low cross but a deflection takes the sting out of it and it's easy for John Ruddy to collect.

Button followed that up with a very nervous punch from what looked a routine cross. The groans from the away support were audible.

This time David Button is alert at his near post - and he had to be.

Tahith Chong backs up Marc Albrighton and unleashes a rocket from just inside the left side of the box that the surprised keeper touches wide.

Postpublished at 29 mins

29 mins

Birmingham 1-0 West Brom

Oof, goodness me.

Crazy collision between Maxine Colin and Conor Townsend as they go for a high ball. Looks like the Baggies man has come off worse from the clash of heads.

Might need a bandage here. Needs a new shirt for sure after a bit of blood is spilled.

Darren Carter
Ex-Birmingham midfielder on BBC Radio WM

Image source, Rex Features

[Birmingham boss] John Eustace will be delighted. His team have shown a real intensity and have played a lot more on the front foot than West Brom.

But there are just signs that West Brom are getting into positions that can cause Blues problems.

Okay Yokuslu is down after taking a bit an elbow to the head from Lukas Jutkiewicz in an aerial tussle.

Soon back to his feet, though. Okay is OK.

West Brom have turned up.

Marc Albrighton sprints down the right and sticks in a nice cross that Daryl Dike just cannot meet. Blues clear but the visitors are beginning to get a foothold.

Good bit if January business bringing in Albrighton, you would think.

Ooh, let-off for Blues.

Kevin Long's backpass is a bit under-hit and John Ruddy has to race from his goal, just getting to the ball before Baggies striker Daryl Dike.

Ruddy's clearance ricochets off the USA forward and could have gone anywhere - but flies high, wide and handsome.

Darren Carter
Ex-Birmingham midfielder on BBC Radio WM

Blues have played really well in this opening period, they've moved the ball quickly too.

Hannibal Mejbri is running this game.

Birmingham utterly dominant in midfield.

Mejbri forces another Albion mistake and releases Maxime Colin, whose cross towards Lukas Jutkiewicz is just about dealt with by the visitors' defence.

Ged Scott
BBC Sport at St Andrew's

Image source, Getty Images

Wow!

D'you think Hannibal Mejbri enjoyed that one?

What a way to score your first goal in senior football!

You can blame the keeper if you like but that takes a bit away from Mejbri's moment of magic. A superb piece of quick thinking. And a stunning piece of skill . . . the bend on it was sensational.

Roberto Carlos meets Carlos Valderrama!

David Button has had a bit of an iffy time of things this season and he's only back in the side due to an injury to Alex Palmer.

That goal won't have helped his confidence.

West Brom have only lost to Sheffield United, Burnley and Coventry under Carlos Corberan.

But they haven't looked like a side with 10 wins from their past 13 Championship games here.

Darren Carter
Ex-Birmingham midfielder on BBC Radio WM

Birmingham's midfield diamond is causing Albion all sorts of problems. It's so congested in there and if anything drops in there, Blues are all over it.

Tony Brown
West Brom's all-time record goalscorer on BBC Radio WM

Albion have got to up the tempo. There needs to be more urgency and they need to move the ball quicker.