Dallas Mavericks owner Mark Cuban insisted trade rumours claiming the NBA franchise are shopping star Kristaps Porzingis are "not accurate".

The trade deadline is March 25 and speculation over Porzingis has intensified amid reports the Mavericks have gauged the Golden State Warriors' interest.

Dallas acquired Porzingis in a trade with the New York Knicks in 2019, pairing him with Luka Doncic but the Latvian big man has struggled for form and fitness.

Cuban, however, denied the reports regarding 2018 All-Star Porzingis – who was the fourth pick in the 2015 NBA Draft.

"It's not accurate," Cuban told The Dallas Morning News. "We have not discussed him in a trade at all. Has not happened."

Prior to Tuesday's clash with the Boston Celtics, Mavericks head coach Rick Carlisle added: "I know Mark's denied it. I'm denying it."

Porzingis is averaging 20.5 points, 8.2 rebounds and 1.3 assists per game for the Mavericks (14-15) this season.

The 25-year-old returned from a knee injury in January, which he sustained in October.

"He's had to play his way into shape, and it just hasn't quite been the same," said Carlisle.

"It's not an excuse thing in my mind. These are just the true facts of what's happened."