The Senegal international will return to St James' Park this weekend needing no introduction, and his former manager knows exactly what will be required to spoil his day.
Pardew said: "You know if you give him an opportunity, there's a good chance he's going to score. You have got to limit his opportunities, Demba.
"He's a clinical finisher, so it's about not giving him the moment.
"We missed Demba in the three games in which we hadn't got a replacement for him, or replacements in the shape of Yoan and Moussa.
"But we now have, so we are back to the sort of strength we had before he left. But he (Ba) is a fine player and he's doing a super job for Chelsea."