Upamecano: Mbappe shown 'lack of gratitude' in latest France omission
Mbappe was not included for France's upcoming fixtures against Israel and Italy as a "one off", according to Didier Deschamps.
The France captain also missed Les Bleus' last two matches, being rested despite his return to fitness in time for the October international break, with Mbappe coming under scrutiny for his absence.
The 25-year-old played the duration of Real Madrid's 4-0 win over Osasuna at the weekend, but was unable to find the target for the fourth game in a row.
Mbappe has netted six goals in 11 LaLiga appearances since his move from Paris Saint-Germain, but has underperformed his season's expected goals (xG) total by 2.04.
He has also scored 48 goals in 86 outings for his nation, along with helping them claim the 2018 World Cup and 2020-21 Nations League title.
Despite the recent speculation about Mbappe's absence from the side, Upamecano leapt to the defence of his team-mate and is hopeful for a swift return to the France set-up.
“Am I worried [about Mbappe]? No. You can’t forget what he’s done for the France national team. We lack a bit of gratitude towards him," Upamecano said.
"I hope to see him again quickly. You can’t forget that he is our captain."
When asked if Mbappé’s absence could be due to physical or mental fatigue, Upamecano expressed understanding for his team-mate’s situation.
“There are many games, and I mentioned this at the start of the season. We’re human, and mental well-being is a big factor for us.
"I won’t go into details, but as I said, he’s our captain, and I hope he’ll be back with us soon. He’s very important to us.”