Aleksandar Mitrovic is looking very, very tired out there now but at least he only has to go through the motions for another 10 minutes or so. Both teams look pretty spent energy-wise now.

There's a break in play as Grant Ward receives treatment after picking up a knock.

He can't continue, and is replaced by Ethan Robson for Blackpool's fifth and final change.

Chris Maxwell is at full stretch to keep out Kyle Edwards' low drive, after the West Brom substitute created a yard of space for himself just to the right of the Blackpool penalty area.

Seven minutes of extra time remain.

Ian Wright
Former Arsenal striker on BBC One

It was a little worrying over the last couple of weeks, the way Arsenal were. I was asking Alan [Shearer] for tips on how to deal with being in that position in the table! But it has been a good turnaround - very, very good.

Although, it's a massive blow that Gabriel Martinelli has been injured. He gives Arsenal and Mikel Arteta that energy. To see him go down it was really quite worrying.

The game is really opening up at Turf Moor.

Both sides look keen to land a knockout punch in the next eight minutes rather than take their chances in the penalty shoot-out.

The final 15 minutes of this encounter are under way.

QPR are going to need to produce something quite special to turn this around now.

Half time in extra time with Fulham on their way.

BBC One

Amid the madness of extra-time in three games, there's live coverage of the 17:30 GMT kick-off between Arsenal and Newcastle on BBC One.

You can also follow it live on the BBC Sport website. Get stuck in...

Both teams still appear to have plenty of energy left and the game is still flowing nicely from end to end.

Gary Madine is unable to meet a free-kick for Blackpool, and the hosts are able to clear their lines as West Brom take their turn to press forward.

That was served up on a silver platter for Dale Stephens.

But the Burnley man drags his shot wide from 15 yards out.

He might have a penalty to take pretty soon from a similar spot. We go to shoot-outs if there is not a goal in the next 12 minutes.

Off we go again!

That is the half in extra time.

MK Dons boss Russell Martin can't issue any instructions. He was sent to the stands earlier in the match.

It is really chucking it down by the way.

Sullay Kaikai shoots over for Blackpool in first-half injury-time in extra-time.

It remains level, with just 15 minutes to go until we resort to penalties.

Crtl-C, Crtl-V. It is another great save from MK Dons goalkeeper Lee Nicholls, who gets down really sharply to block Matej Vydra's near-post close-range effort.

Close for Fulham as Bobby Decordova-Reid glances a header wide. QPR seem quite content to either try and snatch this on the counter or take the game to penalties. They have nearly everyone back defending.

What a ping!

Ben Gladwin sets himself fully 25 yards from the Burnley goal, puts his laces right through it and thuds the ball against the upright with goalkeeper Will Norris beaten.

We have BBC radio coverage for all four of tonight's late games.

BBC Radio 5 Live will bring you full match commentary from Arsenal v Newcastle at 17:30 GMT and then Manchester United v Watford at 20:00 GMT. We have regional commentary from the other two late games.

Click here for a full list.

Arsenal v Newcastle United - 5 Live & BBC Radio Newcastle - 17:30 GMT

Brentford v Middlesbrough - BBC Radio London & BBC Radio Tees - 18:00 GMT

Huddersfield Town v Plymouth Argyle - BBC Radio Leeds & BBC Radio Devon - 18:00 GMT

Manchester United v Watford - 5 Live, BBC Radio Manchester & BBC Three Counties Radio - 20:00 GMT

West Brom take their turn to attack, but Grant Ward calmly chests a cross back to his goalkeeper.

Who has one more moment of quality left in them? It's there for the taking for both sides.