Klopp fielded a strong side but allowed the likes of Alexander-Arnold and Woodburn to gain some experience. It worked handsomely, the former assisting Origi for the opener before Woodburn made it two with his first goal for the club.
All over at Anfield. Leeds, much to their credit, put up a solid sight and battled throughout, but couldn't quite capitalise on their chances as Liverpool took advantage towards the end of the game.
Full-time: Liverpool 2-0 Leeds United
90: To confirm, Ben Woodburn becomes Liverpool's youngest ever goalscorer, taking the record from a certain Michael Owen!
84: Leeds should have had it int he net that time! Sacko with a neat one-two to emerge beyond the Liverpool defence, but his shot goes sailing over the bar.
83: Leeds to have the ball in the net, but the flag was up early for offside.
81: Ben Woodburn scores his first Liverpool goal in front of the Kop, what a moment for the 17-year-old! Origi moves into the box, sets up Origi who rolls the ball across for the youngster, who promptly crashes it into the net. What a moment for him. Milner on for Ejaria.
GOAL! Ben Woodburn!!!
77: Origi's third League Cup goal of the season, and whilst the Belgian's movement was good, he's got Alexander-Arnold to thank for a brilliant ball into the box, allowing the striker to put the ball into the net with a deft touch.
GOAL! Origi nets!
72: Off the post! Wijnaldum bursts through down the right hand side of the area, placing a good shot that comes back off the post into Mane's path. His touch is heavy, the ball breaking for Ben Woodburn of all people, his shot is blocked.
67: Stewart comes off for Liverpool, 17-year-old Ben Woodburn on! He made his first team debut by coming on for the final couple of minutes against Sunderland at the weekend, but this is a bigger chance for the promising Welshman.
66: Ohhh! Alexander-Arnold sells Can short with a pass, it's broken up and Leeds counter with Roofe forcing Mignolet into action.
65: Liverpool do have a weakness at set-pieces, and Bartley almost took advantage of it there, heading wide from a corner.
63: Leeds make a change as Kevin Stewart gets some treatment, Wood on for Dallas.
61: After a shaky start to the half, Liverpool are looking better now as Moreno has a low cross blocked before Wijnaldum and Phillips enjoy a coming together in the area, the former wanting a penalty that was never going to be given.
60: Good driving run from tonight's home captian, Lucas Leiva, who promptly sets up Emre Can to shoot, the German having a deflected effort drop into the goalkeepers hands.
Back to the action!
It's 0-0 after 55 minutes, Liverpool, fielding a fairly strong side that includes the likes of Mane and Wijnaldum, have had the better of things just about. However, Leeds have hit the post through Roofe, and look dangerous on the counter.
Huge apologies for the technical problems that have prented us bringing you tonight's game so far folks, we're back now though so a quick update before we get into the swing of things.
One blow for Liverpool tonight will be the absence of Philippe Coutinho, the first game the Brazilian has missed through injury after damaging his ankle ligaments in Saturday's 2-0 win over Sunderland. He's set to be out for five-to-six weeks, hoping for a New Year's Eve return, when Liverpool play Manchester City.
Leeds are having a good season in the Championship themselves though, and find themselves fifth in the table after 18 games. They've only drawn two of those games, so extra time tonight seems unlikely! They come into the game off the back of an away win against Rotherham this weekend, a 2-1 success.
Glancing at Liverpool's recent form would worry Leeds, as the hosts for this game haven't been beaten in over three months of football, the last defeat coming away to Burnley in the Premier League. Since then they've been electric both in the league, rising to second place having scored more goals than any other team. Defence is a concern, but when you're putting six past Watford, five past Hull City and four past Crystal Palace, those concerns are dampened somewhat.
Leeds don't have as much recent form in the competition, but they had a credible run to the quarter-finals before being beaten 5-1 by Chelsea in 2012-13. Can they spring a surprise at Anfield tonight and go one step further than then?
The Reds are no strangers to this stage, having gone past it in each of the past two seasons. Two years ago, they reached the semi-final stage before being knocked out by Chelsea, whilst Jürgen Klopp's men went even closer last season, losing on penalties in the final to Manchester City.
Liverpool are heavy favourites for tonight's clash, due to being a divison above Leeds, but given the stature of the two clubs, it's bound to be an extremely intriguing clash as they bid to reach the semi-final stage of this year's competition.
Good evening to one and all, and welcome to VAVEL UK's live minute-by-minute commentary of tonight's EFL Cup quarter-final fixture between Liverpool and Leeds United. I'm Oliver Emmerson, and I'll be taking you through events at Anfield, with kick-off set for 19:45 BST. Stay with me until then though for build-up to the fixture, plus the confirmed team news when it comes out.