Carter was first injured Friday against the New Jersey Nets. Magic coach Stan Van Gundy said Carter aggravated the ankle again Tuesday night against the Detroit Pistons. Carter's status is day to day.
The 32-year-old guard was Orlando's biggest acquisition this summer. The Magic acquired Carter from New Jersey in a trade that sent Courtney Lee, Rafer Alston and Tony Battie to the Nets. Orlando also received Ryan Anderson.
Meanwhile, small forward Mickael Pietrus returned to the Magic's lineup Wednesday after missing two straight games with flu-like symptoms.