Emlyn Begley
BBC Sport at Deepdale

A standing ovation for Daniel Johnson as he's replaced for Preston. He had a good game, shooting over in the first half. He's replaced by Tom Bayliss.

Into the last 15 minutes everywhere but Arsenal. Penalties coming up?

Mauricio Pochettino has played all his cards now. Erik Lamela sprints on to replace Oliver Skipp. There's a lot of attacking talent in that team now - though I wonder if Pochettino is regretting not naming Harry Kane on the bench?

Image source, Reuters

Southampton's Cedric Soares slides a ball across the face of goal inside the Portsmouth six-yard box, but none of his team-mates are alert enough to tap the ball into the empty net.

Are Tottenham getting frustrated? Son Heung-min collects the ball and looks up, only to see Dele Alli and Lucas Moura tightly marked. Son smashes one from distance but it's way off target.

Into the last 15 minutes.

No goals in any of the second halves so far.

Close to a goal back for Luton. Substitute Izzy Brown, who came on for George Moncur, has a go in a central position but Foxes goalkeeper Danny Ward saves the strike with his legs.

A reminder that there's no extra time tonight so we could be on for a few penalty shootouts in the Carabao Cup...

That would have cheered Chris Waddle up - Phil Foden lashes a shot against the crossbar.

Image source, Rex Features

Arsenal have a free-kick in a dangerous position 25 yards from goal and they play it short, rolling it to Bukayo Saka, free on the left side of the penalty area, but his first touch is a poor one, the ball bounces off him and Forest clear.

Leicester happy to play keep-ball and make Luton charge around trying to get it back. Still 2-0 to the away side.

Emlyn Begley
BBC Sport at Deepdale

City's first change. Benjamin Mendy replaces Angelino at left-back. He was bright on his first City start since 2016.

And that's quickly followed by a second sub. David Silva comes off for 18-year-old Adrian Bernabe.

Another chance for the hosts at Hillsborough, it again falls to Sam Winnall but he can't keep his header from Adam Reach's free-kick down.

Image source, Rex Features

The sort of red card you see coming a mile off as Stoke defender Nathan Collins runs it out from the back, takes a hefty touch and then is always stretching to try and reach it. He slides into a Crawley attacker and that's red.

Mauricio Pochettino has seen enough and looks to the wealth of talent on his bench. On come Son Heung-min and Christian Eriksen, off trot debutants Japhet Tanganga and Troy Parrott.

Son has been involved in 15 goals in his past 11 appearances in domestic cup competitions against sides from a lower division (nine goals, six assists). Not a player you want to see when you're a tiring League Two defender.

Image source, Reuters

Back under way at the Emirates for the second half.

No goals in the second halves yet...

Leicester captain Wes Morgan has an effort saved by Luton goalkeeper James Shea, who also saves a follow-up from Wilfried Ndidi. That would've been a third for the Foxes and a place in the fourth round.

The closest Preston have come, maybe the closest they will come - Josh Harrop rattles the base of the post from a narrow angle.