Jürgen Klopp has confirmed Lucas Leiva will be out for around 'five or six weeks' after suffering a quad injury during the penalty shootout in the Capital One Cup final.

The Brazilian was carrying a knock when he stepped up to take Liverpool’s second kick at Wembley last Sunday and exacerbated the issue as he struck from 12 yards.

“Lucas is really unfortunate. It’s a little bit more serious,” the manager said at his pre-Crystal Palace press conference.

“I’ve never heard about an injury you get like this, from a penalty, but it was only because he was a little bit injured before.

“He didn’t feel too much but after the shot it was done. [It’s a] quad – I don’t know exactly but five or six weeks [out], not too good.”

There was positive news on defender Mamadou Sakho, though, who has returned to training after being forced off during the final against Manchester City due to a clash of heads with Emre Can.

Klopp said: “Mama did a little bit today for the first time, but we didn’t really do a lot because it was the second day after a game.

“The only session we have is tomorrow and we have to see how he is then, but today was the first day he did a little bit more.

“[And] Daniel Sturridge trained completely normally yesterday.”