Liverpool boss Jurgen Klopp admitted that substituting key players like Mohamed Salah can improve the team at times.
Salah was furious when he was hooked with the scores at 1-1 against Sheffield United.
However, Klopp's decision was correct, as the team went on to win 3-1 and go back to the top of the league table.
Klopp confessed to TNT Sports: "Our general game until I think we made the changes was not great.
That's what we have to admit.
"It's tricky, we had such a low block [from Sheffield United] but you have to do better.
I'm really pleased for Cody [Gakpo] who came on and was incredibly good on the ball, scored a wonderful goal. Robbo [Andy Robertson] good, Harvey [Elliott] good, Curtis [Jones] good.
"They were really helpful and that's how it is; you have to change games from the bench when needed and so I'm really happy with that."