Liverpool's second EFL Cup outing of the season saw them ease into the fourth round with a 3-0 victory over Derby County.

Ragnar Klavan, Philippe Coutinho and Divock Origi provided the goals for the Reds, but it was not the attacking flair on show that made the biggest impression on Darren Bent.

Instead, the veteran Rams forward was most taken aback by the relentless work-rate of Jürgen Klopp's team.

"What really impressed me about them last night is how hard they work. Every time we got the ball and tried to keep it, they were after us, and tried to win it back within five or 10 seconds.

"We played as well as we could, we gave it a good go, but it just wasn't good enough. They kept possession so well, moved the ball, looked dangerous, looked effective and I'm sure they'll have a good season this year.

"If you talk about the top end of the Premier League and the top end of the Championship, the gap is massive. The technical ability, the power, the arrogance as well. When you play a top Premier League side, they all seem to come onto the pitch with this arrogant swagger, that they know they're not going to get beaten."