The 32-year-old returned to the side in mid-December after being sidelined since August with hernia and groin problems.
He has looked increasingly sharp and scored twice in the 7-0 demolition of Ipswich Town in the FA Cup third round.
The absence of Terry and Lampard through injury has coincided with Chelsea's worst run of form in 15 years and they are currently fourth in the Premier League, seven points behind leaders Manchester United, who have a game in hand.
Earlier this month, Lampard conceded his team have been lacking in confidence.
"You lose the feeling of being able to win every week," he said. "Once you've had that and lose it, it's hard to get it back."
Meanwhile, Ancelotti has refused to confirm that the club have put in a revised offer for Benfica defender David Luiz after they had a £17m bid rejected at the end of last month. He also denied Chelsea have held discussions with Udinese about winger Alexis Sanchez.
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