The New Orleans Saints aren't sure if Drew Brees will play in Week 11 after he injured his ribs on Sunday.

Brees will have an MRI and X-rays to determine the extent of the injury, which occurred during the Saints' 27-13 win over the San Francisco 49ers.

"I'm just taking it one day at a time. I've done that this entire season. And I'll continue to do that. I'm not sure what tomorrow holds," Brees said. "But you can know I'm gonna do everything I can to be as effective as I possibly can come next week.

"I mean, nothing's a long-term thing. It's just a matter of how long it's gonna be. And honestly, I really don't know. It's not something, quite to this extent, that I've experienced."

Brees, 41, played the final eight minutes of the first half after absorbing a big hit by the 49ers' Kentavius Street.

Brees said he felt worse after the halftime break, so Jameis Winston played most of the second half in his place.