BOSTON—Jaylen Brown scored 26 points and Jayson Tatum had 24, carrying the Boston Celtics to a 101–98 overtime victory over the Indiana Pacers on Monday night in the first of a home-and-home series between the teams. “We stuck with them and ran them a little bit longer, but we knew the importance of this game,” Boston coach Ime Udoka said of his two stars, Brown and Tatum. Robert Williams III had 14 points and 12 rebounds for Boston, along with a key block in OT. The Celtics won for the fourth time in six games. “We stayed together through the end of the game,” he said. “We went through adversity, a couple of arguments within the team (during the game).” Pacers scoring leader Domantas Sabonis was held to 11 points but had 23 rebounds after scoring a career-best 42 points in his last game. He finished with a triple-double, adding …