Liverpool captain Jordan Henderson admits Sheffield United striker Oli McBurnie was a handful on Saturday.
Liverpool came from behind to win 2-1.
Henderson said, "It was hard as expected, they are a good side who work really hard. We knew it would be difficult and we are delighted to get the points.
"McBurnie was very good in the air so it was hard for the lads at the back but they coped and worked it out better in the second half. We should have killed the game off with another goal or two.
"I am only interested in the mentality in our changing room and I see hunger, resilience, character to dig in and win if you are not playing at your best. We showed we can dig in and see results out."
