Daniel Agyei goes close to doubling the visitors lead but his effort is well saved by Nathan Ashmore.

A fierce cross-shot from Alfie May is well held by Jack Sims.

Is there time for Sutton to launch something?

We are into four minutes of injury time, which begins with Birmingham on the ball.

We're into three minutes of stoppage-time.

Richard Wilford
BBC Radio WM commentator

There's a sense of story of the season for Blues in this game when they're not finishing games off.

The O's are so close to doubling their lead soon after but Daniel Agyei was unable to provide the finish after a lovely run, shooting narrowly wide of Ashmore's goal.

Darren Carter
Ex-Birmingham midfielder on BBC Radio WM

That is the best chance Sutton have had in this half.

Ashley Nadesan didn't connect with it fortunately for Blues because if he did he would have taken the net off with that volley.

Here is the chance that Sutton have waited all half for.

The ball reaches Ashley Nadesan at the back post, with a bit of space. He decides to take it on the volley from seven yards, but he shins it into the ground and watches the ball bounce into the ground and land on the roof of the net, almost in slow motion.

Not sure they will get a better opportunity to equalise than that.

Craig MacGillivray is called into action for the umpteenth time today and is down to his right to save Myles Hippolyte's shot.

Goalscorers Matty Stevens and Omar Bugiel then get the chance for an ovation as they are subbed off for Joe Pigott and Josh Kelly.

This is basically Chris Davies' first-choice Birmingham side and they are still having to work.

That shows why you often have to go strong to avoid an upset.

Late changes for the hosts as Connor Thompson-Sommers is replaced by MJWilliams and Scott Hogan comes off for Callum Hendry.

Thompson-Sommers has put in a shift, but Hogan has fed off scraps today.

Lukas Jutkiewicz has immediately got himself involved in things.

He has a shot deflected wide from just outside the area after a clever turn and he has a header blocked from the resulting corner.

The Duke has not scored since March - he looks keen to end that drought.

Toby Lock
MK Citizen's sports editor on BBC Three Counties Radio

AFC Wimbledon are doing the right thing. They've taking their time and killing the game as much as they can.

They're forcing MK Dons further and further back.

The ole's ring out in the North Stand as Wimbledon play the ball among themselves as weary MK chase shadows.

The tie seems to be petering out as the visitors close in on a third successive victory over Milton Keynes.

A switch of play from Orient's Ethan Galbraith almost puts Sonny Perkins in on goal but the ball is slightly too ahead of the Leeds loanee.

Birmingham have been ahead for over 40 minutes and in control for far longer.

But as we enter the last 10 minutes, the tie is still far from over.

Here comes Lukas Jutkiewicz along with Alfons Sampsted.

Jay Stansfield and Ethan Laird have completed their work for the day.

Jutkiewicz is immediately greeted with shouts of 'Duke' from the away contingent.

The home fans may have already started longing for the final whistle as they are serenaded by the delighted Wimbledon supporters.

Not fun.

10 minutes to go and no sign of a fightback from 10-man MK Dons.