"Hopefully, towards the end of the week it starts to get better," Freeney said at Tuesday's media day. "The decision will come later on in the week. It's kind of early now."
Freeney said it's "very discouraging" not to be able to practice for Sunday's NFL title game against the New Orleans Saints.
"The competitor in me says they'll never stop me from being on the field," he said with a laugh before adding: "There's some pain there definitely with throwing everything at it, all types of techniques to find the best thing to get this thing as good as possible. You name it, I've probably done it."
Freeney injured the ankle in the AFC championship game nine days ago. He said chances of him practicing the rest of the week are not good. He's the only starter on either team who might miss the game because of injury.
Freeney led the Colts with 13 sacks and is considered the leader of a defense that has performed well in the playoffs.