Al Horford and the Boston Celtics have broken off talks on a new three-year deal.
Horford is expected to sign a four-year deal with a rival team in free agency.
Horford declined his $30.1 million player option with the Celtics on Tuesday.
Horford joined the Celtics in free agency in 2016.
Mark Murphy of the Boston Herald reports that the Celtics believe Horford may already have a good sense of where he will sign given how quickly the negotiations changed.