The 26-year old struggling goalkeeper was again in the spotlight for Chelsea’s frail defence.
Chelsea dropped more points in the league in Saturday’s 3-3 draw against Southampton.
The Blues have dropped seven points in their first five games even after huge spending in the summer transfer window.
Edouard Mendy is out after suffering an injury in the international break and Kepa was recalled for the Stamford Bridge clash on Saturday.
Kepa made some good stops in the first half but was at fault for Southampton’s second goal and Lampard hopes he can get through this difficult period of form.
The Spaniard is struggling for form but Chelsea boss Frank Lampard has vowed to keep supporting his goalkeeper.
“He has to be strong enough mentally, that’s the job we’re in,” said Lampard.
“He has to deal with that, he has the support of myself and his team-mates.
“He has to keep working, that’s the only way through it… to work and feel the support of everyone around him.
“It’s unfortunate because he did make two really good saves today, but obviously with something like the second goal then eyes are drawn to that.
“But it certainly wasn’t just Kepa involved in that.
“Mendy will probably be fit in the next week or two weeks and that’s a decision then about who plays.