The NBA fan banned for life from Utah Jazz home games after getting into a heated exchange with Russell Westbrook claims the mercurial guard misheard him during the dustup, a new lawsuit alleges.

Shane Keisel — a US Army vet who said he lost his security guard jobs in the aftermath of the March incident at Vivint Smart Home Arena — is seeking $68 million in damages from the Jazz and Westbrook for defamation and infliction of emotional distress, the Salt Lake Tribune reports.

A lawsuit filed Monday claims that Westbrook, 31, either misheard or mischaracterized Keisel yelling for him to wrap his knees so he could play better as the game went on.

“The crowd was shocked by the ferocity of Mr. Westbrook’s outburst when he had only been told to take care of his knees,” the lawsuit states.

The verbal altercation was caught on video and went viral last season when Westbrook — now a member of the Houston Rockets — was playing for the Oklahoma City Thunder.

“I’ll f–k you up,” Westbrook, 31, shouted toward the stands. “You and your wife.”

Westbrook, who was fined $25,000 by the league for the outburst, later told reporters that Keisel had told him to “get down on my knees like I’m used to.”

Keisel’s girlfriend, Jennifer Huff, who was with him at the time, is also seeking $32 million in damages on the same claims, according to the report.

The couple also wants a public apology from Westbrook, according to the filing.

A source close to Westbrook, meanwhile, blasted the lawsuit as “meritless,” TMZ reports.

“The Jazz conducted their own investigation of the guy’s conduct at that game and based on their investigation, they decided to ban him from attending any future Jazz games,” the source said. “Westbrook’s entire camp is confident the court will support the Jazz’s findings.”

Team officials said they stand by Keisel’s permanent ban.

“The organization investigated the underlying incident and acted in an appropriate and responsible manner,” a spokesman for team owner Larry Miller told the Tribune. “We intend to vigorously defend [against] the lawsuit.”