Acuna suffered the injury in the seventh inning while beating an infield single. The 20-year-old immediately went down to the ground but was able to walk off the field under his own power.
The Braves later announced that Acuna exited the game with knee and lower back pain.
"We haven't really gotten any reports, except just that he's sore,'' manager Brian Snitker said. "He's being looked at, so we'll know more.''
Acuna finished Sunday 1-for-3 with a run scored in the Braves' 7-1 victory. He is batting .265 with five home runs and 13 RBIs in 29 games this season for Atlanta.
Acuna waved his arms "safe'' as he crossed the bag before his left foot gave out. He walked off the diamond slowly, passing on a wheelchair that was rolled out for him.
"You really didn't have to say much when you heard all the 'oohs' and 'aahs' from the crowd when they showed the replay,'' said Mike Foltynewicz, the winning pitcher Sunday.
The Associated Press contributed to this report.