Frank Lampard has admitted he will fight to boost Kepa Arrizabalaga’s brittle confidence after the goalkeeper’s latest mistake in Chelsea’s 2-0 Premier League loss to Liverpool.

Sadio Mane blocked Kepa’s laboured clearance and tapped home his second goal as 10-man Chelsea succumbed to Jurgen Klopp’s defending Premier League champions at Stamford Bridge.

Andreas Christensen’s red card handed Liverpool an advantage they fully exploited, but Blues boss Lampard conceded Kepa was at fault for the second goal – and is in desperate need of a confidence boost.

Lampard revealed veteran Willy Caballero will start Wednesday’s League Cup clash with Barnsley at Stamford Bridge, but insisted that was always the plan, even before Kepa’s latest costly error.

Thiago excelled off the bench in Henderson’s stead though, leaving Klopp to praise the Spain midfielder.

Alisson saved Jorginho’s second-half penalty, ending the Italian’s flawless run of eight successful spot-kicks for the Blues, and that left Klopp hailing the ideal west London afternoon.

“Jordan (Henderson) said he had a knock and I told him not to carry on because we didn’t want to take a risk with him,” said Klopp.

“But then even without training, and albeit against 10 men, Thiago set the perfect play in that position.

“Everything he did was perfectly natural. Alisson saved a penalty, Thiago made his debut – and if Hendo has absolutely nothing to his injury, it’s a perfect day.”