Liverpool hero Didi Hamann says they must be stronger mentally if they're to compete for trophies.

Liverpool face Chelsea tonight in London.

"Mentally and psychologically Liverpool will need to improve to challenge for the title. Jurgen Klopp needs to mould his side and instill this psychology, but the players have to do their part as well," Hamann told Paddy Power.

"Klopp has brought a new belief to Anfield, but the players have to maintain that belief when the chips are down.

"They can't be phased by a big occasion. This group suffered two really disappointing results last season losing to Manchester City in the League Cup final and Seville in the Europa League Final. You can't afford many of those results, because you're not going to get many chances to right those wrongs."