David Ngog guided Liverpool into the League Cup fourth round as Rafa Benitez's under-strength side ground out a 1-0 win at League One leaders Leeds United.

Benitez made nine changes from the side which triumphed at West Ham on Saturday, yet his fringe players failed to sparkle until Ngog struck with a low right-foot shot past Leeds goalkeeper Shane Higgs. However, Simon Grayson's impressive outfit emerged with their pride intact and their reputation enhanced after pushing Liverpool all the way in front of a raucous Elland Road crowd of 38,168.

"The foreign lads don't have this type of cup in their own country and you tell them beforehand its going to be a very difficult game and that's as difficult a game we've had all season," Liverpool's Jamie Carragher said. "It was a great performance from Leeds. They've been a little bit unlucky that we've won it but I'm glad that we have."

Old rivalry
For the fallen Yorkshire giants, the significance of a first meeting with Liverpool since February 2004 ran deep. This was about regaining lost pride, of letting the football world know about the steady renaissance taking place at Elland Road under Grayson's astute guidance.

Former Elland Road trainee Grayson has steadied the ship and his men went into the game on the back of 15 successive home league wins. Leeds, seemingly inspired by the raucous home crowd, fashioned the better goalscoring opportunities during the opening exchanges.

In the 11th minute, the impressive Robert Snodgrass reached the right-hand byline and flighted in a delightful cross which Michael Doyle headed wide from 10 yards. Moments later Leeds had the ball in the back of the net when defender Lubomir Michalik headed goalwards from a corner and Jermaine Beckford buried the ball from close range, only for the strike to be disallowed for an offside infringement.

Liverpool looked to Jay Spearing and Javier Mascherano to knit the midfield together but Ngog and Ryan Babel largely flattered to deceive up front. In the 14th minute, Frenchman Ngog flashed a low shot wide at the near post and then Babel fired straight at Higgs after a neat turn of pace.

Liverpool looked far from secure at the back and in the 32nd minute Beckford's delightful flick sent Snodgrass free down the right flank. His teasing cross had Diego Cavalieri at full stretch and his desperate palm away was far from convincing.

Liverpool continued to probe and only a fine reflex save from Higgs denied them the opening goal when Albert Riera connected with Fabio Aurelio's inswinging free-kick. Leeds went close again four minutes after the restart when Beckford fired a low shot goalwards from six yards, but Carragher, skipper for the night, made a vital block to avert the danger.

Beckford showed outstanding dexterity to arch himself into position to hook a right-foot shot narrowly over the crossbar in the 63rd minute as Leeds sought the breakthrough they doubtless felt they deserved. Yet the goal came at the opposite end of the field three minutes later when Mascherano's high ball was expertly controlled by Ngog, who swiftly turned and dispatched a low right shot into the bottom corner.

"We worked hard and I feel we had our chances," said Liverpool manager Rafael Benitez. "We won with a lot of players not playing and I am really pleased with my team, with the squad.

"These kind of games are very important to keep the quality of character. I think it was a fantastic win for us. I think we showed today we can manage with different players and for the rest of the season it is important to know you have players who can come in."