Defending champions the Boston Celtics held off the Orlando Magic 107-98 to win game four of the first round of the NBA play-offs.
Jayson Tatum scored 37 points and claimed 14 rebounds, making all 14 of his free-throw attempts, including four in the final minute.
The Magic levelled the game at 91-91 in the fourth quarter but the Celtics took control by scoring 10 of the next 11 points at Kia Center in Orlando.
Boston, who are seeded second, are 3-1 ahead in the best-of-seven Eastern Conference series.
The New York Knicks and the Indiana Pacers also took 3-1 leads in the East.
The Pacers beat the Milwaukee Bucks 129-103, with the Bucks losing point guard Damian Lillard to a non-contact injury.
The 34-year-old, who has recently returned from a blood clot in his right calf, hurt his left leg in the first quarter and will have an MRI scan on Monday.
The Knicks edged out the Detroit Pistons 94-93, but there was controversy at the end when the Pistons' Tim Hardaway Jr missed what would have been a winning shot at the buzzer with no foul called as he was knocked by Josh Hart.
In the Western Conference first-round series the Los Angeles Lakers fell to a 113-116 defeat by the Minnesota Timberwolves.
Luka Doncic scored 38 points and LeBron James 27 for the Lakers, but they will have to rally from 3-1 down when they host game five on Wednesday.
BBC