Grimsby's Donovan WIlson nods just past the post from Anthony Glennon's cross as the Mariners seek to win it.

There will be eight minutes added. Wouldn't bet against more than that too, such is the nature of the game at present.

Five minutes of added time.

Can Kidderminster make anything of them?

Back under way at the Mornflake Stadium.

League One Derby have work to do this second half against their League Two opponents.

The Rams looked like the stronger side early but failed to deal with Crewe at crucial moments and they paid for it.

Lots of time though to find an equaliser.

Stop-start stuff at Arbour Park as injuries, substitutions and infrigments interrupt the flow of the game.

Just a few minutes of normal time, plus presumably a decent slab of added time, for one of these sides to snatch a winner and avoid a replay.

Christian Dibble again to the rescue.

Jack Marriott's effort swerves from distance and the Harriers keeper parries.

A follow-up then flies just wide. Fleetwood have had 20 shots today so far and five on target.

But the hosts are still in this - they have four minutes to force a replay.

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Into the final 20 minutes as Fleetwood press for a decisive third goal.

Jack Marriott races through but Christian Dibble stands tall to block his shot with his chest.

Then a triple change as Kidder go for broke.

Maguire, Mclean and Pearce come off for McDonagh, Preston, and Hemmings.

A closely contested game between Crewe and Derby.

But it's The Railwaymen who are on top and they could be two up.

The Rams with work to do after the break.

Tyrese Dyce is on hand to clear Niall Maher's header off his own goalline as Grimsby press for a leveller.

Slough won't need reminding they have won only two of their previous 19 meetings with league teams in this competition, the last win coming against Walsall 19 years ago.

It's going to be a long final 25 minutes or so, that's for sure...

Spell of pressure from the visitors and Grimsby's Jamie Andrews bends a left-footed free-kick into the top of Rohan Luthra's crossbar near the top of the upright.

As close as they've come.

Take a bow Christian Dibble!

The Kidderminster stopper makes a superb save to keep out Ben Heneghan's towering header and perhaps keep the hosts in the tie.

He might be having a word with his back four, though. The Fleetwood man was left completely free.

Harry Clifton fires just past the left-hand post from the edge of the box for Grimsby.

Sharp intake of break from the majority of the 2,205 at Arbour Park - a new record attendance.

The visitors are stepping it up after the break.

By the Derby keeper Joe Wildsmith!

Rio Adebisi pounces on a mistake by the Rams defence and shoots but he is denied by the big paw of the six-foot shot-stopper.

This game has evened out a little now.

Derby still on top but Crewe are making the most of their chances.

Almost a third for Fleetwood.

This time Jack Marriott flashes a drive just past the far post.

Kidderminster need to regroup quickly and stay in the game.

Michee Efete goes into the book for Grimsby after an ill-advised lunge on Scott Davies. That's two Mariners in the book.

A day to forget so far for the Grimsby faithful who have already seen their side lose four straight in League Two.

Double change for the Mariners at the break. Rekiel Pyke and Kieran Green are coming on with Abo Eisa and Kamil Conteh withdrawn by the visitors.

Something needed to change. Will that do the trick?

We're under 45 minutes away from a big upset.

Derby have taken control of this game quickly following that early scare from Crewe.

The Rams have had a couple of chances and shot cleared off the line.

Approaching the halfway mark of the opening 45 minutes.

All the drama came at the end of the half as Josh Earl cancelled out Kidderminster's opener from Bailey Hobson.

Fleetwood had the greater chances in that half, but the National League side will be delighted to go in level at the break with their League One counterparts.

The shock is still up for grabs.

All to play for in the second 45.