Cavs C Jarrett Allen questionable for Game 1 vs. Celtics

Cleveland Cavaliers center Jarrett Allen, who has a right rib contusion, is questionable for Game 1 of the Eastern Conference semifinals against the Celtics in Boston on Tuesday.

The Cavaliers advanced to the semis by beating the Orlando Magic in seven games in the first round. Allen missed the final three games with the injury, which he appeared to suffer when he took an elbow to the ribs from Orlando's Franz Wagner in the third quarter of Game 4.

Allen, 26, averaged 17.0 points and 13.8 rebounds in the first four games of the series.

The top-seeded Celtics will be without their center, Kristaps Porzingis, who has a right calf strain. He said Saturday that he is going through rehab but is on a week-to-week basis.

The series will continue Thursday in Boston with Game 2 before moving to Cleveland for the next two games in the best-of-seven series. The Cavaliers are the No. 4 seed.