Aaron Rodgers feared he had suffered a punctured lung in Sunday's 40-33 loss to the Philadelphia Eagles but remains hopeful of playing next week.
The Green Bay Packers quarterback exited the game in the third quarter due to a ribs injury, which Rodgers said he sustained in the first half.
Rodgers said it was re-aggravated in the third quarter, leaving him in "intense pain".
"[I was] Just having a hard time breathing and rotating my upper body," Rodgers told reporters. "I was worried about a punctured lung as well, so I wanted to get that checked out. We'll get a scan tomorrow."
Rodgers jogged to the locker room in the third quarter for examination although he said initial X-rays provided little clarity on the extent of the issue.
Despite that, the 38-year-old quarterback, who has been playing with a broken thumb on his throwing hand since Week 5, remained hopeful of playing against the Chicago Bears next Sunday.
The four-time NFL MVP threw two touchdown passes and two interceptions in the first half before leaving the game. Rodgers has thrown seven interceptions this season, his most since 2016, along with 19 touchdowns across 11 starts.
Rodgers dismissed any talk of shutting him down either, as the loss left the Packers with a 4-8 record to be third in the NFC North.
"As long as I check out fine tomorrow, I'll expect to play next weekend," Rodgers said. "I might not be able to go Wednesday but as long as there's no major structural damage, I'll try to get back out there.
"Hopefully everything looks good tomorrow, then heal up for a couple of days and see if I can go back out there."
Packers head coach Matt LeFleur backed Rodgers' toughness to play through pain, in a sign he is not considering shutting him down either, despite 24-year-old backup Jordan Love throwing a TD pass for Christian Watson in a bright cameo.
"This is one of the toughest dudes I've ever been around so I don’t ever for a second question his toughness, his desire to be out there, his desire to compete," LeFleur said.
"He apologised to me. I said 'don't ever apologise to me'. I'll never question that. This guy is the ultimate competitor.
"He's been battling through a lot of stuff all year long. It hasn’t just been this year. It's been the last few years that we've been together. He doesn’t say anything about it, he just keeps competing and being the best he can."