The American, who has been in fine form since the restart, limped off with a calf injury during Sunday's win over Leicester City.
Lampard also added that Andreas Christensen was a chance to return after missing the Leicester clash with a hip problem.
"Christian felt a bit of tightness in his calf when he came off against Leicester," said Lampard.
"We're managing him. I haven't got an answer for him yet, it feels better than it did at the end of the game, so we'll see by tomorrow.
"Andreas Christensen likewise is in the squad, but we will have to see with another 24 hours because of the tight turnaround."