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.

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

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.

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

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

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.

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.

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

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.