Jurgen Klopp has called on Liverpool's players to deliver another "wonderful reaction" to seal the side's first top-flight title in 30 years.
The Reds slipped to a third loss in four matches with Tuesday's 2-0 FA Cup fifth round defeat at Chelsea, to leave boss Klopp accepting the Anfield men have lost their head of steam.
Chelsea's Willian and Ross Barkley hit the net, Kepa Arrizabalaga delivered a redemptive goalkeeping show and 18-year-old playmaker Billy Gilmour dominated all comers at Stamford Bridge.
Jorginho will miss Sunday's Premier League clash with Everton due to suspension, and the Blues could be without as many as nine frontline talents this weekend.
"Both of them have Achilles issues, so Willian hopefully is not too bad, that's what he's reporting," said Lampard.
"Kovacic was slightly worse, but hopefully not too drastic... we'll see.
"We'll have to have a bit of a count on Thursday, with the game on Sunday and see where we're at.
"You can moan about injuries, and I have done, but the reality is you have to get on and keep fighting.
"When the players show the spirit they have tonight you hope it gives them a bit of strength, whoever comes in, to keep going forward."
