Gronkowski, who set an NFL record for tight ends with 17 touchdown catches this season, limped off the field in the third quarter of Sunday's 23-20 win over Baltimore in the AFC championship game but returned about five minutes later. On Monday he was seen wearing a removable boot on his left foot.
Asked how Gronkowski was progressing, Belichick said, "good, good."
"We'll just have to see, you know," Belichick said. "He's not going to practice today, so take it day by day. I'm not going to try to forecast where things will be 10 days from now. We'll just take it day by day."
Gronkowski started all 16 regular-season games and two playoff games. Belichick said he believed Gronkowski took part in just about every practice this season.