"He's better day by day," Deschamps told reporters. "I won't deny that he is as keen to play tomorrow as he was to play against the Netherlands."
Mbappe raised hopes of a return against already-eliminated Poland in the final group game when he put on a protective mask and took part in a practice match on Saturday.
Speaking to reporters before Deschamps, France midfielder N'Golo Kante hinted that Mbappe could be back against Poland, a match France need to win to overtake Netherlands as group leaders.
"With Kylian back, I think that can help us to score and win. Clearly, it's a big plus to have Kylian back," Kante said. g