Pochettino, however, insists the conversation was more laid back than stern.
Pochettino, speaking ahead of tonight's FA Cup fifth-round replay against Rochdale at Wembley, said: "After the Palace game we had a short chat about this situation.
"He is an easy target for other fans as it is easy to complain about or accuse Dele.
"He is very focused on trying to improve, we are focused on trying to help him. He is a great player, a great kid and a very competitive guy who wants to win.
"He is an amazing player with an amazing personality and of course he is always in focus, as Rooney was.
"I am happy with him and all players need to improve in different areas, not only in football. In these types of situations, it is about being clever.
"Don't be the focus for these types of situations. Be the focus for scoring great goals."