Lampard confirmed that Barkley is the penalty taker when he is on the pitch having taken some in pre-season.
The Chelsea boss said: "Ross is the penalty taker, was in pre-season and was when he came on. I don’t know what the conversation was, but Jorginho and Willian were the takers until Ross came on."
He added that Mason Mount has an ankle injury but it is too early to say how serious that is.
"He has got an ankle injury, we don’t know how bad it is and will assess it. Too soon to say. It’s a shame because he has been playing so well."