After 20 years, two NBA Finals meetings and countless major moments, Kobe Bryant cherishes the history and tradition of the Los Angeles Lakers’ rivalry with the Boston Celtics.

Byron Scott hopes the youngsters currently wearing those famed uniforms now understand what the rivalry means to the men who came before them after watching the way Bryant left it.

Isaiah Thomas scored 26 points, and the Celtics clinched a playoff berth while besting Bryant for the final time with a 107-100 victory over the Lakers on Sunday night.

Bryant scored 34 points in his final showdown with the Lakers’ traditional rivals, putting up the second highest-scoring performance of his farewell season. And unlike in most games on this strange, friendly farewell tour of the NBA with a miserable Lakers team, Bryant wasn’t having much fun.

“This is probably the first game in a while where K.B. was dead serious for the whole game,” said Scott, the longtime Lakers guard whose distaste for the Celtics is palpable. “He understands it’s serious.”

Bryant hit a jumper with 56 seconds left, and Julius Randle’s three-point play moments later trimmed Boston’s lead to four points, setting off roars at Staples Center. But Bryant missed two late jumpers, and the Celtics secured their eighth playoff berth in nine years.

“It’s weird, the last time I’m facing that green,” Bryant said. “It’s been a joy to go against them, to be a part of a rivalry that I’ve watched for so long.”

Randle had 20 points and 10 rebounds, and Jordan Clarkson added 17 points in the Western Conference-worst Lakers’ 60th loss of the season.

Jae Crowder added 22 points for the Celtics, who blew an early 17-point lead and survived a tense fourth quarter in their first game since snapping the Golden State Warriors’ NBA-record 54-game home winning streak.

Evan Turner scored eight of his 17 points in the fourth quarter, while Amir Johnson had 10 points and 13 rebounds for the Celtics, who were grateful to survive Bryant’s last shot.

“That’s the best player of my generation,” said Thomas, who scored 13 points in a 2-minute span of the second quarter. “He changed the game, not just on the court, but off the court. He means a lot. That’s my favorite player.”

The Celtics host the New Orleans Pelicans on Wednesday.

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