Liverpool boss Jurgen Klopp admits Roberto Firmino's injury hit their plans during Sunday's 0-0 draw at Manchester United.

The Brazilian was forced off after half an hour with an ankle injury and replaced by Daniel Sturridge, before being spotted leaving the gorund on crutches after the match.

He is now likely to miss the title chasers' next Premier League match against Watford on Wednesday.

Klopp said, "It was a strange game. We started really well. All the injuries in the game obviously cost us rhythm. It happened to us with 'Bobby' and that was a catastrophe.

"United played with a completely new midfield and three up front. We lost our rhythm and couldn't get it back.

"On days when United are beatable you have to do it and we didn't do it. We have a point more and Wednesday is out next game."

Klopp added: "It is his ankle. First he said he could carry on, then that he couldn't. I don't know exactly the extent of the problem."