The thousands of blue shirts inside a scorching Signal Iduna Park in Dortmund finally got to witness a Frenchman scoring for their side when Mbappe netted in the 56th minute.
The French captain ripped off his protective mask to celebrate his 48th strike for his country and it looked as though Deschamps’ side would be coasting towards top spot in Group D.
However, Poland – who will be jetting home tomorrow after finishing bottom of the group – had other ideas as they surprised the 2022 World Cup finalists.
Upamecano, who has found himself on the bench for much of Bayern Munich’s season, made the defensive mistake to concede the penalty leveller with a clumsy tackle that caught Karol Swiderski.
After a stuttering run-up, Lewandowski scuffed his first attempt and Maignan saved well, but had stepped off his line too early and could not stop the second finish into the same corner.
France then struggled to create any good opportunities to claim the victory, despite dominating the match with 58% possession and 19 shots on goal.
Lukasz Skorupski did well in the Polish goal, but Deschamps’ men will enter the knockout stage having netted only twice – one of them an own goal – in their three group games.
They are reliant on Mbappe – now just one goal behind Michel Platini’s French record of 14 in major tournaments – but he needs more attacking help if his side are to progress further.
The talented Dembele threatened occasionally on the right of the front three but has yet to score for his nation in a major tournament.
Deschamps will know his side must find their form quickly if they are to go all the way in Germany.