Isaiah Thomas scored 33 points, and the Boston Celtics beat the Chicago Bulls 104-95 on Sunday to tie their first-round playoff series at 2-all.
Boston blew a 20-point lead, but Thomas keyed a third-quarter run that put the Celtics back on top after Chicago briefly went ahead.
Gerald Green made four 3-pointers on his way to 18 points, helping the top-seeded Celtics return the favor in Chicago after dropping the first two games at home. Al Horford added 15 points and 12 rebounds.
Game 5 is Wednesday in Boston.
Jimmy Butler carried the Bulls with 33 points and nine assists.
>>Cavaliers Bounce Pacers in First Round
LeBron James made the go-ahead 3-pointer with 1:08 to play and helping the defending champions hold on for a series-clinching 106-102 victory at Indiana.
James finished with 33 points, 10 rebounds, four assists, four steals and two blocks.
James' teams have eliminated the Pacers four times in six years and completed the first-four game sweep in Indiana's NBA history.
Lance Stephenson led the Pacers with 22 points. Paul George had a series-low 15.
