Sweats. Burnley are having to do some defending in the final seconds. Fleetwood's long throws test their defence but they scramble it away.

Just over 15 minutes of normal time remaining. Still no sign of a winner. Spurs send on Dejan Kulusevski and Oliver Skipp.

Casemiro has changed the game. He almost puts United ahead, heading Bruno Fernandes' cross straight at the keeper under pressure from Tomas Soucek.

Ian Dennis
BBC Radio 5 Live senior football reporter

At least we've got penalties in this game. We surely will see a goal then!

Michael Emons
BBC Sport at Old Trafford

At first look it appeared to be Wout Weghorst's second goal for Manchester United in his 13th appearance since his loan spell from Burnley.

But, actually, it's the opposite number 27, Nayef Aguerd, who produced the header to send it into the net for an own goal.

No-one at Old Trafford supporting the home side cares about that though. Eleven minutes, plus injury time, for either side to get a second or it's extra-time.

Grimsby manager Paul Hurst talking to ITV: "Just delighted for the players. What an effort. We kept disciplined. Look at what that means to the support. We turned up, hoping for a miracle and to be in the quarter-final is incredible. It is just a fantastic day, we have gone down in the history books. It is a very special day."

Pat Nevin
Former Scotland winger on BBC Radio 5 Sports Extra

It was an own goal. Wout Weghorst has frightened the life out of the defenders and Nayef Aguerd takes the ball away from his own goalkeeper.

Grimsby Town were due to play Sutton United away on 18 March. Scrap that. They've got an FA Cup quarter-final to look forward to.

Ian Dennis
BBC Radio 5 Live senior football reporter

That's 17 games without a goal for Richarlison.

Spurs are sending on the big guns. Harry Kane for Richarlison. The Premier League club want this done and dusted without going to extra time.

Michael Emons
BBC Sport at Old Trafford

West Ham fans celebrate that VAR intervention as much as they did for the goal and Manchester United and Casemiro are denied.

Manchester United have 17 minutes plus added time to force this into extra time or snatch a come-from-behind win.

It's going to seem a long 20 minutes or so for David Moyes and the West Ham fans.

INCHES.

Nathan Tella puts another ball in for Burnley from the right and it trickles across the six-yard area.

That's happened several times in the second half. Fleetwood clinging on for their lives!

A titanic result for Grimsby Town. One of the greatest nights in their history. Their players are heading over to where their 4,000 fans are celebrating wildly. They are in FA Cup dreamland.

It's been ruled out! No goal. Casemiro is offside. The West Ham cheer loudly at Old Trafford.

On comes Jarrod Bowen, replacing Pablo Fornals.

Chris Wise
BBC Radio 5 Live commentator at St Mary's

There is the final whistle. Grimsby are living an FA Cup fantasy what incredible night for them at St Mary's.

Fish everywhere!

Grimsby Town are in the quarter-finals of the FA Cup after a famous win.

What a day for the Mariners.

Michael Obafemi pounces on some hesitation at the back but his cross rolls along the goalline before it's hooked away desperately.