Boston Celtics guard Marcus Smart has been fined $25,000 by the NBA for pulling Atlanta Hawks guard Trae Young to the floor and initiating an on-court altercation late in Boston’s 134-125 win over Atlanta. With 1:25 remaining and Boston leading 129-121, Young and Smart had to be separated after they were entangled and fell to the court under the Celtics’ basket. Smart was called for an initial foul before a lengthy review by the officials called both players for technical fouls and ejected Smart.

Donovan Mitchell scored 40 points and Lamar Stevens fueled Cleveland’s fourth-quarter with his hustle, leading the Cavaliers to a 118-114 win over the Boston Celtics, who lost their second overtime game in less than 24 hours. Evan Mobley added 25 points and 16 rebounds for the Cavs, who improved to 7-0 in OT while avenging a loss in Boston five days ago. Jaylen Brown scored 32 points and Malcolm Brogdon 24 for the Celtics, who didn’t arrive at their hotel in Cleveland until 2:30 a.m. after losing to the New York Knicks in double overtime on Sunday. The Celtics, who were without MVP candidate Jayson Tatum, had a chance to win it in regulation but Grant Williams missed two free throws with 0.8 seconds left.

Immanuel Quickley scored a career-high 38 points, playing 55 minutes in place of injured starter Jalen Brunson, and the New York Knicks outlasted the Boston Celtics 131-129 in two overtimes for their season-high ninth straight victory. Quickley had seven points in the second overtime and added eight rebounds and seven assists with Brunson sidelined because of soreness in his left foot. Julius Randle had 31 points and nine rebounds, and RJ Barrett finished with 29 points and 11 boards for the Knicks, who held on when Boston’s Al Horford front-rimmed a 3-pointer from the right corner just before the final buzzer.

Mikal Bridges scored 38 points and the Brooklyn Nets overcame a 28-point deficit to stun the Boston Celtics 115-105 on Friday night. Part of the trade that sent Kevin Durant to Phoenix, Bridges has reached 30 or more points in three of Brooklyn’s last six games. He also had 10 rebounds, playing nearly 43 minutes. Fellow former Sun Cam Johnson added 20 points. Dorian Finney-Smith finished with 17. It is the largest comeback by a Boston opponent since the Los Angeles Clippers also rallied from 28 down to beat Boston 123-112 at TD Garden on Feb. 9, 2019. Jaylen Brown led Boston with 35 points. Jayson Tatum, who was celebrating his 25th birthday, added 22 points and 13 rebounds.

Jayson Tatum scored 18 points in a pivotal third quarter and finished with 41 points as the Boston Celtics held on to beat the Cleveland Cavaliers 117-113. Tatum added 11 rebounds and eight assists as Boston earned its first victory in three games versus Cleveland this season. With his 20th career 40-point game, the 24-year-old Tatum surpassed Giannis Antetokounmpo for seventh place on the NBA’s all-time scoring list for players under 25. It helped Tatum outduel fellow All-Star Donovan Mitchell, who scored 44 points and sidestepped an injury following a fall in the third quarter. Al Horford added 23 points and 11 rebounds for Boston. Jaylen Brown finished with 16 points.