Midfielder Lampard — one goal shy of Bobby Tambling’s 202-goal club record — will start tomorrow’s Premier League game at Aston Villa.
But Benitez made no promises for the final, saying: “I will do what I have to do to win it and if I can help Frank at the same time, I will do it.
“At centre-half the competition is really hard. Gary Cahill, Branislav Ivanovic and David Luiz are also doing well.
“So now we have four centre-backs who have to compete with each other and I cannot say anything about Terry playing in the final. I haven’t decided yet.”