Now it's the visitors' turn to threaten.

Omar Bugiel gets a good cross in but Matty Stevens is stretching and can only head it wide of the left-hand post.

Not the greatest contest it has to be said, but early days.

Image source, Rex Features

Blues goalkeeper Ryan Allsop is booked for dissent after rushing out of his box to let referee Ben Atkinson know what he thought about the non-award of that penalty shout.

Will he come to regret that later in the game?

The hosts continue to threaten.

Kane Lemonheigh-Evans spins his marker and plays a neat flick around the corner but the intended pass to Scott Hogan, lurking in the penalty area, is cut out.

Darren Carter
Ex-Birmingham midfielder on BBC Radio WM

Sutton are really deep at the moment.

Birmingham are content to work the ball around across the backline and through midfield.

Sutton are content to let them have it there and close the spaces.

It is adding up to a bit of a stalemate in these early minutes.

First card of the day as Wimbledon's Josh Neufville scythes down Joe Tomlinson and goes into the book.

MK Dons' Tomlinson made sure the referee knew he'd been caught but that's a clear booking.

Image source, Rex Features

A quietish start on the pitch as both sides look to get the measure of their opponents.

And a chance!

Kane Lemonheigh-Evans is caught in possession asMK Dons play out from the back and suddenly there's a three-on-two for Wimbledon.

But the pass from Miles Hippolyte is a poor one, leaving Alistair Smith none too pleased.

Birmingham full-back Ethan Laird is tripped by Charlie Waller and referee Ben Atkinson is very quick to blow for a free-kick on the edge of the box.

But the TV replays show it was at least a yard inside the area!

No VAR here, so no pen! Although Jeremy Sivi is booked for tugging Laird before he got into the box, so the referee may have decided that was the original offence for which he blew the whistle.

Sutton goalkeeper Jack Sims is forced to dash out of his area and put the ball in the stands.

A slight heart in the moment mouth for Sims, but he dealt with it well in the end.

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

It's been a bit of a scrappy start.

MK Dons have probably seen more of the ball but nothing to write home about for either side.

Scott Hogan dances into the Wimbledon box and Alex Gilbey is free and screaming for a pass.

But when it arrives its loo late and the visitors eventually clear.

Birmingham boss Chris Davies has got plenty of cup pedigree in his coaching career as he was assistant to Brendan Rodgers to win the FA Cup with Leicester and the Scottish Cup with Celtic north of the border.

But this is the first time the result of an FA Cup tie rests entirely on his shoulders as head coach.

There's a good atmosphere at Stadium MK - particularly for a lunchtime KO.

Both sets of fans are bringing the noise.

MK keeper Craig MacGillivray gets an early touch of the ball to cut out a teasing cross.

Good work from Jayden Harris wins Sutton a very early corner, but it comes to nothing and it gets cleared away by Blues.

Nice show of intent though from the non-leaguers, though.

MK take the kick-off and we're under way at Stadium MK.

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

It's funny how the draw works sometimes but this is probably the pick of the draw of the first-round ties for anybody who knows their history of this fixture.

Image source, Rex Features

The teams have emerged from a very tight tunnel at Gander Green Lane (think old school Plough Lane) and the final formalities are done in this one and up the M1 in Milton Keynes.

We're ready for some cracking Sunday FA Cup stuffing.

A quick reminder that as of this season, all ties in the FA Cup will be decided on the day.

Whether it's 30 minutes of extra time and then penalties, we will have five winners this afternoon.

We had 10 ties reach extra time yesterday and three of those had to be decided on spot-kicks.

You can tune in to BBC local radio commentary of four of our five matches this afternoon by clicking on the 'watch & listen' tab at the top of this page.

MK Dons make three changes from the side which won 3-1 at Grimsby last weekend.

Craig McGillivray takes over in goal from Tom McGill, Dean Lewington returns in defence to captain the side, and Kane Thompson-Sommers comes into midfield.

AFC Wimbledon are unchanged from the starting XI which lost 3-2 at leaders Port Vale last Saturday.

MK Dons: MacGillivray, Lewington (c), Sherring, Gilbey, Tomlinson, Nemane, Offord, Leigh, Thompson-Sommers, Lemonheigh-Evans, Hogan.

Substitutes: Harness, Pritchard, Tucker, Williams, Harrison, Wearne, Ilunga, Hendry, White.

AFC Wimbledon: Goodman, Johnson (c), Tilley, Maycock, Bugiel, Neufville, Smith, Stevens, Ball, Hippolyte, Lewis.

Substitutes: Ward, Biler, Furlong, O'Toole, Kelly, Harbottle, Williams, Ogundere, Pigott.