Rams forward Tom Lawrence works an opening, but sends his effort off target from the edge of the area.

So close!

Mason Bennett's back post header goes back across goal, and drops onto the post!

Leeds clear, but have had a massive let-off.

Almost a chance for the Rams!

Jayden Bogle gets to the edge of the area but is crowded out by white shirts.

He scuffs his shot completely.

The Rams recycle the ball and win a corner on the right.

Pablo Hernandez gets a good crossing opportunity on the Leeds right.

The ball goes to the back post and Stuart Dallas can't help it back across goal.

Derby can't create an opening.

Another ball looking to get into the Leeds area is cut out.

Marcelo Bielsa's side have things figured out at the moment.

Image source, Reuters

Derby centre-back Fikayo Tomori cuts out a promising low cross from Jack Harrison.

Pablo Hernandez has a shot blocked.

Leeds work the ball back out to the left and Harrison then puts in an even better delivery.

It just evades Patrick Bamford and a desperate Tomori six yards out.

Derby left-back Scott Malone chases a ball over the top from Duane Holmes, but he can't get on the end of it.

Kalvin Phillips wins the ball bravely on halfway and sets Patrick Bamford running at the Derby defence.

He gets to the edge of the area, drops in a stepover and sends a tame shot straight at Kelle Roos.

A shot from range from Stuart Dallas wins Leeds a corner.

Luke Ayling goes in at the near post, but the ball goes behind for a goal-kick, despite his protestations otherwise.

Leeds midfielder Kalvin Phillips clears from his own byline under pressure from Tom Lawrence and the hosts work a good passing move to come forward and win a throw-in on the right.

Hamza Darby: If Leeds could play Derby every week.

Zak JT Mckeown: Currently following the game by the stadium, on the motorway next to it, stuck in the mile of traffic... C’mon you Whites!

Mark Gillingwater: Derby fan here. Can l just say that I'm not supporting Forest in the play-offs this year? Cheers.

David Thackeray: My goodness, Anthony Taylor is going to earn his wages tonight.

Six names in the book already in the first third of this game!

Image source, Reuters

Patrick Bamford goes down in the box following a challenge from Derby skipper Richard Keogh.

The Leeds striker claims a penalty.

Referee Anthony Taylor gives Bamford a yellow for simulation instead.

Almost 2-0 on the night.

Mateusz Klich is set up for a shot from 25 yards and it is deflected off a Derby defender and onto the bar.

The Rams scramble the ball behind for a corner.

Leeds keeper Kiko Casilla steps out of his area to clear the danger from a Derby ball forward.

The Spaniard is yet to make a save over the course of this tie.

Still waiting for the first Derby effort on target. We've been waiting since Saturday afternoon.

Colin Hazelden
BBC East Midlands Today Sports Reporter

That’s an absolute sucker punch Leeds have delivered to Derby. Rams on top. Crowd getting quieter and quieter. And then up pops Dallas.

Image source, Rex Features

Ian Woodcock
BBC Sport at Elland Road

Leeds firmly in control now.

Derby have probably posed more of a threat in the first 20 minutes or so of this game than they did in the full 90 at Pride Park but it's a huge ask for them to score two now.

Elland Road is just about shaking as the home fans break out into Marching on Together.

Mount swings in the set piece.

It goes deep, to the far post, and goes harmlessly out for a goal-kick.

Leeds midfielder Kalvin Phillips gets yellow for leaving a foot in on Mason Mount.

Derby have a free-kick wide on the left.

Leeds United fans are understandably in good voice now and giving Frank Lampard some stick.

Do the Rams have an answer on the pitch?