Mbappe fires France warning after Germany friendly defeat
"We need to be aware that if we play like that in the big matches that lie ahead of us, we are setting ourselves up for major disappointment," Mbappe said on Monday, following Saturday's 2-0 defeat against the European Championship hosts in Lyon.
Germany took the lead through a Florian Wirtz strike after just eight seconds, with Kai Havertz scoring their second goal shortly after half-time.
It was just France's second defeat since they lost the 2022 World Cup final on penalties to Argentina in Qatar -- the other was a 2-1 reverse in a friendly away to Germany last September.
"Now that game is over with and our objective is to show a reaction. We need to be aware that we didn't play well enough," added Mbappe, who was speaking in Marseille, where France will face Chile in another friendly on Tuesday.
Les Bleus have reached three finals out of the last four major tournaments, European Championships and World Cups combined.
They also won the UEFA Nations League in 2021, and are being tipped as the favourites for the Euro alongside a strong England side.
Paris Saint-Germain star Mbappe was keen to point out that France won just once in their six games leading into the last World Cup, before going on to reach the final of that competition.
In contrast they came into the last Euro in 2021 in excellent form, only to go out in the last 16 on penalties to Switzerland.
"There have been tournaments where in the matches we have played beforehand we have taken beatings but then have played well in the competitions themselves.
"There have also been competitions where we won the friendly games in the build-up but then ended up being knocked out and going home early," said Mbappe, who won his 76th cap against Germany aged just 25.
"The friendly matches give indications but not the whole truth. The proof of that is that we have lost twice to the Germans in friendly games but I have never lost to them in a competitive match."
France are in a group with the Netherlands and Austria at the upcoming Euro, which will take place in Germany from June 14 to July 14.
They will also be alongside the winner of Tuesday's decisive qualifying play-off between Wales and Poland.
Mbappe also said he expected to be jeered by the crowd in Marseille, with France playing in the home stadium of PSG's bitter rivals.
"It doesn't matter what kind of welcome I get. I will still give my best," he said.
"To be honest, I would understand if I were whistled."
He will return to Marseille with PSG for a league game this coming weekend.