TORONTO — The finale of the Nets’ preseason provided a sneak preview of their regular season. They play hard. They play sloppily. And they lose.

Brooklyn fell 119-114 at the Raptors on Friday, turning the ball over wantonly and digging a deep hole before a fourth-quarter rally came up just short.

Michael Porter Jr., despite being a game-time decision with jet lag, poured in a game-high 34 points and 10 rebounds, shooting 6-of-11 from deep. It’s a statement of just how porous the forward’s defense was that he finished minus-8.

Defensive-minded Ziaire Williams scored 20 on an encouraging 4-of-8 from behind the arc, an auspicious sign for the season.

But Cam Thomas had just seven points on uncharacteristic 1-of-10 shooting, 0-of-4 from deep.

Most damning were the turnovers.

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