Team USA men’s basketball was put on notice Sunday night when the team shockingly lost to France in the first game of Group A of the Tokyo Olympics.

U.S. head coach Gregg Popovich has particularly been under the microscope going into the Olympics after losing two exhibition games and a new report shed light on how the locker room is feeling amid the downturn.

CLICK HERE FOR MORE SPORTS COVERAGE ON FOXNEWS.COM

U.S. men’s basketball players are frustrated about having to run the San Antonio Spurs’ offensive sets during games, The Athletic reported Sunday. Sunday marked the Americans’ first Olympic loss since Argentina beat them in 2004.

Popovich, who took issue with a reporter from The Athletic over the assumption Team USA would blow out teams, reiterated after Sunday’s loss this was no real surprise.

"There is nothing to be surprised about. They knocked down some 3s down the stretch and we made some mistakes. As Draymond (Green) said, we had (a seven-point lead) late in the game and we gave up 3s, so those are mistakes by players. Those things happen. But if we can be more consistent during the game, we wouldn’t have been in that position. When you lose a game, you’re not surprised. You’re disappointed," said Popovich, who is the Spurs' head coach.

DOMINICAN REPUBLIC'S EURI CEDENO MARTINEZ DEFEATS OLYMPICS OPPONENT IN 67 SECONDS

He added: "I think that’s a little bit of hubris if you think the Americans are supposed to just roll out the balls and win. We’ve got to work for it just like everybody else. And for those 40 minutes, they played better than we did."

France snapped Team USA’s 25-game win streak, 83-76, in the first game of the group stage. Popovich is 6-3 since taking over as Team USA's head coach.

Evan Fournier led France with 28 points and four rebounds. Rudy Gobert added 14 points and nine rebounds.

LIVE UPDATES: TOKYO OLYMPICS 2021

Jrue Holiday, fresh off an NBA Finals victory with the Milwaukee Bucks, somehow led Team USA with 18 points.

"We have to defend better down the stretch," Green said. "And close the games out."

The Americans will look to bounce back Wednesday against Iran. They finish their group play against the Czech Republic on Saturday. France plays the Czech Republic on Wednesday and Iran on Saturday.

CLICK HERE TO GET THE FOX NEWS APP

The top two teams from Group A advance to the knockout round.

The Associated Press contributed to this report.