"He is an exceptional player but still needs to improve a lot," said the German before one of the most important matches of the Ligue 1 season so far.
Tuchel added: "He can improve on timing, defensive aspects, learning to look for spaces and understanding the game".
Nevertheless, the coach insisted that Mbappe is playing at a devastating level and that, being so young, he can still progress in these areas.
At the press conference, the coach explained that he could soon be putting Cavani, Neymar, Di Maria and Mbappe in the starting lineup together, with the Argentine in great form at the moment.