Liverpool coach Jurgen Klopp says his side did not play at the level required to beat Manchester United as the Reds suffered a 3-2 defeat in the FA Cup fourth round on Sunday.
The visitors led early on thanks to Mohamed Salah's opener, with the Egyptian's second of the game bringing the Reds level after Mason Greenwood and Marcus Rashford had put the Red Devils ahead.
Bruno Fernandes settled the tie after 78 minutes with an excellent free-kick that beat Liverpool goalkeeper Alisson at the far post.
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Klopp was happy with many aspects of his team's performance, but feels they made too many mistakes in key moments.