Leeds were denied a place in the semi-final as Liverpool ran out 2-0 winners.
Leeds' run in the EFL Cup may be over but it is likely that Garry Monk will be reflecting incredibly positively on his side's trip to Anfield as they pushed a fairly strong Liverpool side, but ultimately came up short as Jurgen Klopp's men showed their quality and scored twice in the final 15 minutes.
But on a night that wrote the latest optimistic chapter in the story of Leeds' season, here is a look at five things that we learned about Monk's men:
Luke Ayling is clearly Leeds' best permanent signing from the summer
Luke Ayling has rightfully been receiving plenty of praise for his performances at right-back this season, but few would have expected such an assured performance when the defender came on for centre-back Liam Cooper at half-time. With the Whites lacking depth in that position, having a fourth option in Ayling is a massive plus for Monk. The quality of the cross that led to the winning goal was too good for any of the blame to be placed on the former Bristol City man.
Liverpool's Georginio Wijnaldum in action with Leeds' Charlie Taylor
Charlie Taylor is ready for the Premier League
Charlie Taylor's immediate future will arguably be one of the main subplots at Elland Road during the January transfer window, and his performance at Anfield will surely have enhanced his chances of attracting bids from Premier League sides. His reading of the game and his composure going forward meant that he did not look out of place at all playing against one of the country's most exciting teams.
Kemar Roofe will come good
The 23-year-old may have normally been sat slightly deeper than Souleymane Doukara early on, but he was unquestionably the man who looked most likely to break the deadlock in Leeds' favour. His sumptuous effort early in the second-half saw Simon Mignolet beaten, with only the post coming to Liverpool's rescue. He certainly showed that he has the quality to shine.
Leeds' Marco Silvestri saves from Liverpool's Georginio Wijnaldum
Marco Silvestri almost staked a claim to be number one, but needed to do better
Marco Silvestri had an opportunity to send a message to Monk after Rob Green's mistake in the recent defeat to Newcastle. And while his performance was predominantly impressive, and one save in the first-half was sensational, his issues with distribution reemerged on one occasion - though it was not the worst goal kick seen at Anfield in recent times by a long way - and he could have arguably done better for the first goal. He was caught on his heels and Divock Origi was able to sneak in to tuck the ball home. Nevertheless, Leeds, for the first time in years, have two top stoppers in their ranks.
Believe in Garry Monk and promotion could really happen
Leeds are not going to put in such a spirited display every week as it will undoubtedly be difficult to find such motivation in each game, but Monk proved that he is definitely the right man to lead the Peacocks forward. He accepted Liverpool would dominate possession, but still found a way to set his side up so they largely restricted the Reds to half chances until the final 15 minutes when the home side's quality shone through.
Leeds United manager Garry Monk