Looking at the replays... it is a very close call.

Jack Harrison definitely catches Jayden Bogle while trying to clear the ball.

There's an arm in his back from Bogle... but not much contact.

I'm sure Rams boss Frank Lampard will have plenty to say about that post-match.

Image source, Rex Features

Hang on, after coming over to his assistant referee Eddie Smart for a discussion, Craig Pawson reverses his decision!

It's a free-kick to Leeds instead!

That is a massive call and the Rams can't believe it.

Jack Harrison and Jayden Bogle tangle in the area and Craig Pawson points to the spot!

Image source, Reuters

Frustration for Jack Marriott as the Derby striker is pulled up for a foul as he looks to spin in behind the Leeds defence.

Whites keeper Kiko Casilla takes his time to take the resulting free-kick.

Image source, Reuters

Derby are finally playing with purpose and urgency.

A ball is swung into the Leeds box from deep but Kiko Casilla claims that one easily.

But the Rams forwards are starting to get on the ball more and threaten. Leeds are starting to go deeper and are taking their time as they try to take the sting out of the game.

Almost a great chance for Derby!

The Rams spread the ball left and Scott Malone has time and space to drive the ball low across goal.

The ball whistles past everyone - including Jayden Bogle who was trying to get on the end of it - and away.

This is better from the hosts, who have done little going forward so far - the Rams are yet to get an effort on target.

Image source, Reuters

Another Derby free-kick from the right is dealt with by Kalvin Phillips.

The flow of the game has been broken up slightly in the past 10 minutes by substitutions and niggling fouls.

Another change for the Rams, as Mason Bennett comes on for Duane Holmes.

Liam Cooper went down dramatically in the Derby box from a free-kick moments ago, but referee Craig Pawson wasn't buying that one.

A flurry of bookings all of a sudden.

This time it is Rams midfielder Duane Holmes, who loses the ball in a challenge and then handles to stop a Leeds counter-attack.

Image source, Rex Features

Derby skipper Richard Keogh goes into the book now.

That one is for wrestling down Kemar Roofe as the Leeds striker looked to peel away and chase onto a ball forward.

The Leeds wall does its job as Wilson, to the right of the D, goes back across goal left-footed.

The man on the right-hand side of the wall manages to head it away from danger.

Leeds captain Liam Cooper goes into the box for tugging back Harry Wilson right on the edge of the area.

This is a really good position for the Rams.

Cooper's fellow centre-back Gaetano Berardi is also in the book for an earlier challenge.

First change for Derby, as Jack Marriott replaces David Nugent up front.

An excellent challenge by Jamie Shackleton in the Leeds area on Mason Mount sets up a counter-attack, and it should be 2-0.

The Whites come forward and Shackleton gets down the right and pulls it back.

But Pablo Hernandez completely misses the ball and the Rams are let off.

Derby win another free-kick wide on the right, this time for a foul by Jack Harrison on Jayden Bogle.

They can't make anything of this set piece as Leeds keeper Kiko Casilla comes off his line to claim the ball well.

NIck Bruzon: Frank Lampard’s Derby County (TM) fall behind. The Leeds rematch with Aston Villa is going to happen...

Kimemia Maina: Kemar bringing the Roofe down!!!!!

Image source, Rex Features

Can Derby find a way back into this match?

The Rams have already been beaten twice by the Whites in the regular Championship season.

We've not seen much of Frank Lampard's side as an attacking unit so far.

Kemar Roofe comes close to getting a second goal straight away, as he controls the ball and tests Derby keeper Kelle Roos from the edge of the area.

The Dutchman gets down to his left to parry the ball away.

Craig Ramage
Former Derby midfielder on BBC Radio Derby

If you keep giving Leeds that space they will punish you. It was a great ball across but Roofe had too much space.

Where were the central defenders? Disappointing.

Image source, Reuters

Rams winger Tom Lawrence rightly gets cautioned for his foul in the build-up to the Leeds goal.

Marcelo Bielsa may well thank Craig Pawson for letting the play go on there - good refereeing.