Jonson Clarke-Harris plays the ball out for a Sheffield Wednesday throw-in.

Four minutes left.

Francis Green
Ex-Peterborough forward on BBC Radio Cambridgeshire

Six minutes is probably about right.

Now Sheffield Wednesday are just going to pump the ball forward.

Aden Flint comes on for Dominic Iorfa as Sheffield Wednesday make another late change.

That will eat up a bit of time.

Liam Palmer weaves his way into the box from the right and he strikes right-footed but Peterborough keeper Will Norris collects.

Six minutes on the board goes up.

How are your nerves at home?

What a waste.

Will Vaulks' first contribution for Sheffield Wednesday is a scuffed, high and wide volley from the edge of the box as he was completely unmarked.

Peterborough only have a few more minutes to hold on.

Sheffield Wednesday boss Darren Moore is crouched down on the touchline.

He feels the tension. As do basically everyone else in Hillsborough right now.

A long Owls throw-in is cleared by Peterborough, meanwhile.

Finally a Sheffield Wednesday change.

Goalscorer Reece James comes off and is replaced by Will Vaulks.

Peterborough's Jack Taylor goes into the book for a foul on Sheffield Wednesday's Josh Windass.

Image source, Rex Features

Even when Sheffield Wednesday are losing the ball, Peterborough can't seem to keep hold of it and the Owls just keep on winning it back.

Less than five minutes left but it's still all Wednesday.

This has been a poor performance from Peterborough.

Peter: Fair play to Wednesday, but Peterborough have been shocking. Such a negative performance.

Josh Windass sends a ball into the Peterborough box but Michael Smith can't get onto it.

But Peterborough can't keep the ball and Sheffield Wednesday whip it back in and Posh keeper Will Norris loses the ball as he tries to claim in mid air.

The Owls cannot capitalise.

Oh it's tense.

Kwame Poku is replaced by Josh Knight as Peterborough make another change, their third of the evening.

Sheffield Wednesday haven't made a substitution yet.

Right from Barry Bannan's corner, Sheffield Wednesday keep the ball alive and Dominic Iorfa heads from close range.

But Peterborough keeper Will Norris collects. Almost.

Joe: 4-0 is a dangerous lead in the play-offs.

Image source, Rex Features

At this stage, both sets of fans look like their nerves are shot to bits.

I'm glad I'm a neutral, I'm not sure I could handle it.

Josh Windass, meanwhile, curls a delivery into the Peterborough box and Marvin Johnson shoots and wins another corner for Sheffield Wednesday.

The Peterborough fans at Hillsborough look stunned. This is turning into a sobering night for them.

Can Sheffield Wednesday find another goal? No team has ever come from four goals down after the first leg to win a play-off tie before.

15 minutes are left on the clock.

Brian Laws
Ex-Sheff Wed manager on BBC Radio Sheffield

What a return ball from Reece James, at first I thought he'd lost possession, but he just toe-poked it under the goalkeeper.

This is game on!

That goal has rejuvenated the players, they are smelling blood. It will be a long 20 minutes for Peterborough, who will just be trying to hold on.

Image source, Rex Features

Dan Butler goes into the book for remonstrating with referee David Webb in the aftermath of that Sheffield Wednesday goal.

You must say, that goal was coming.

Francis Green
Ex-Peterborough forward on BBC Radio Cambridgeshire

Wednesday are piling balls into the box, and so far Peterborough are dealing well with them.

But you cannot keep allowing them to do that, because one will work out for them eventually.

Posh are getting tired, you can see it, and it's no wonder, because they've been chasing shadows for an hour.

The Owls have guys that can come off the bench and be a big threat too, so it's not going to stop.