BOSTON -- Further testing on the ailing right ankle of Boston Celtics shooting guard Avery Bradley revealed a second sprain and his status to return after the All-Star break is uncertain.

Bradley missed five games last month due to an initial sprain on Jan. 21 in Miami. He returned on Feb. 2, but the team believes Bradley suffered a second sprain three days later in Philadelphia. He sat out one game last week before attempting to return on Sunday against the Dallas Mavericks, but Bradley looked off and the team removed him from the game in the second half.

Bradley underwent another MRI on the ankle that revealed the new sprain. After meeting with team doctors, the Celtics decided to shut him down through the All-Star break, but coach Brad Stevens said it's unclear if he'll be ready when the team resumes play next Wednesday.

"We did another look at it, he’s out tonight, and then possibly will be out after that," Stevens said before Wednesday night's game against the San Antonio Spurs. "Hopefully it’s going to be something that’s not long term, or doesn't look like it will be. It looks like it’s just the same as the first one, so not a long-term thing."

Stevens said the team operated with caution after the first sprain, ensuring that Bradley was 100 percent before putting him back on the floor, and said they'll do the same this time around.

"It’s always concerning when a guy is unable to play," Stevens said. "Again, it’s not a long-term issue. We’ll be very [cautious] -- like I thought we were last time from everything that I could tell. I know that our doctors and our training staff will do their due diligence and will be very conservative with bringing him back, as we should be."

Bradley sat out 12 days after the initial sprain and a similar timeline from the Philadelphia game puts him back around the time the team starts back up after the All-Star break. After Wednesday's game against the Spurs, the Celtics have four days off from basketball activities before reconvening in Phoenix, but don't play again until next Wednesday against the Suns.

Bradley is averaging 14.3 points, 3.9 rebounds and 1.4 assists over 30.6 minutes per game in 46 appearances.