Chelsea manager Frank Lampard says he will try to boost Kepa Arrizabalaga's confidence after another mistake in Sunday's 2-0 Premier League defeat by Liverpool.
Sadio Mane blocked a poor clearance by Kepa - who was also at fault for a Brighton goal in the opening game - and tapped home Liverpool's second goal.
The Blues are close to signing Rennes keeper Edouard Mendy.
"It's a clear mistake that has cost us," said Lampard of Kepa.
"We have to keep working, Kepa has to keep working and he has to have support around him, that's very clear.