INDIANAPOLIS — Tight end Rob Gronkowski is out of the walking boot that he was wearing on his injured left ankle as recently as early this week. But he said Tuesday he remained uncertain whether he would be in the New England Patriots’ lineup for Sunday’s Super Bowl against the New York Giants.

“I don’t know yet,” Gronkowski said at the Patriots’ media-day session with reporters. “We’re going day by day. We’re making new steps every day and feeling better every single day. That’s a positive sign. You just want to keep going in the right direction. I want to be out there with the team, obviously. I want to help out the team, obviously. I’m just taking it step by step and getting better every single day.”

Gronkowski hasn’t practiced since he was hurt in the AFC title game and arrived in Indianapolis still wearing a protective boot on his foot. But he said Tuesday he has gotten out of that for good.

“No more boot,” Gronkowski said.

Gronkowski’s availability could be a significant factor in the outcome of Sunday’s game. He had 90 catches for 1,327 yards and 17 touchdowns during the regular season.