Team doctor Rodrigo Lasmar told reporters that while a scan was needed to confirm the exact diagnosis, he did not think the injury to Neymar's adductor muscle would keep him out long and Neymar confirmed that early diagnosis.
"Thanks to everyone who sent me messages wishing me a quick recovery, I don't think it's anything serious," Neymar wrote on Instagram.
Brazil went on to win the match with Neymar's replacement Richarlison scoring the only goal of the game a minute before halftime.
It took Brazil's record since the World Cup to six wins in six games with six clean sheets.
"We ended the year happy with the work we've done up until now, these last games were important to help us recover after the setback that was the World Cup," Neymar added.
"We remain strong, focused and looking to always get better."
Neymar's injury was not the only concern for PSG on Tuesday with his club strike partner Kylian Mbappe also withdrawn before halftime in France's 1-0 friendly win against Uruguay.
The forward fell awkwardly on his right shoulder after a challenge from Uruguay goalkeeper Marin Campana.
Welbeck injury could force Arsenal into January spending
Arsenal head of football Raul Sanllehi has admitted that forward Danny Welbeck's long-term injury could force the Premier League club to recruit in the January transfer window.
Welbeck, often used as a backup striker by manager Unai Emery, underwent two operations after suffering a broken ankle against Sporting Lisbon in the Europa League earlier this month.
While Sanllehi agreed that Welbeck's latest setback could give youngster Eddie Nketiah a chance to establish himself in the squad, he did not rule out the idea of venturing into the transfer market.
"This is absolutely something unplanned," Sanllehí told The Independent. "I am not saying that is a green light to go to the market because we have some very good players who may now get further opportunities, such as Eddie Nketiah.
"So we need to see. We are in November so it is a good time to start analysing what options we have in the market."
No time frame has been set for Welbeck's return to action, although the England international could be out until the end of the campaign, when his contract expires at the Emirates.
"We are sad for Danny and he knows he has all the support from the club," Sanllehi added.
The former Manchester United striker has been restricted to 126 appearances since moving to Arsenal in 2014, most notably through two long-term knee injuries.