Jayson Tatum Scores 51 as Celtics Rout Sixers in Game 7

Tatum’s scoring output was an N.B.A. record for a Game 7, and it helped send the Celtics to the Eastern Conference finals, where they will face the Miami Heat.

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Jaylen Brown had used his public platform ahead of Sunday afternoon’s game to deliver a clear message to Celtics fans: Get loud.

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The energy at TD Garden for the team’s home games during its N.B.A. Eastern Conference semifinal series with the Philadelphia 76ers had been merely OK, he said.

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On Sunday, Brown got what he wanted for Game 7. It was loud early, and it was loud late.

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The crowd cheered every dunk and 3-pointer, every defensive stop and offensive rebound.

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By the time Boston’s Jayson Tatum stood near the center circle late in the fourth quarter, in the waning moments of a tour de force and the best game of his career, he beckoned the fans for even more noise. They were happy to oblige.

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The crowd was still cheering when the Celtics left the court with a 112-88 victory that decided the best-of-seven series and assured Boston that its championship dream would live on.

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Tatum, a first-team All-N.B.A. selection who had not exactly played flawless basketball during the series, was extraordinary on Sunday,

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scoring 51 points — an N.B.A. record for a Game 7. Brown added 25 points in the win. The Celtics led by as many as 30.

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