CLEVELAND — J.R. Smith said he still believes the Cavaliers can win the series but denied tweeting “Cavs in 7” not long after the Warriors took a 3-0 lead on Wednesday night in the NBA Finals.

The former Knick told Cleveland.com that his Twitter account was hacked. The tweet was quickly deleted.

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“I got out of the shower and my phone was buzzing. I did not tweet that,” Smith told Cleveland.com before leaving the arena Wednesday. “I’m smarter than that.”

No NBA team has ever come back from a 3-0 deficit in any playoff series, and the Golden State Warriors don’t look as if they will squander that lead. They’re 15-0 this postseason and won Game 3 of the Finals in dramatic fashion.

The Cavaliers led by six after Smith’s three-pointer with 3:09 left but never scored again. Golden State ended the game on an 11-0 run and pulled out a 118-113 win.

The Warriors have the opportunity to close out the series Friday night and become the first NBA team to go undefeated in the postseason. Smith, however, said he believes in the tweet he denied tweeting.

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“I do believe,” he said. “But I didn’t tweet that. I would be much smarter than that to tweet that at literally 12:04, right after the game.”