basketball star Luka Don?i? has gone up against the best in the game, but his most recent opponent may be his most formidable: His own mother, Mirjam Poterbin.

Last week, Don?i? filed a “Petition to Cancel” against a trademark of his name that is currently owned by his mom. Don?i? is a three-time all-star guard and 2018 Rookie of the Year. According to court documents, he wants Poterbin to transfer ownership of “LUKA DONCIC 7” back to him.

How did she get ownership of his trademark in the first place?

Growing up as a basketball prodigy in Slovenia, Don?i? has played the game at an elite level since he was only 16. At that time, according to court filings, “he relied on his mother…to provide assistance and guidance for his off-court business opportunities.” This assistance included filing various applications for his trademark.

Now age 23, Don?i?, who recently signed a $215 million deal with the Mavs, wants full rights to all of his trademarks.

“I have a lot to look forward to as I continue to grow as a player and a person, and it’s important to me to control my own brand and focus on giving back to my communities,” Don?i? said in a statement to The Stein Line.

Poterbin, 46, is a former model with over 55,000 followers on Instagram. She has publicly praised her son, calling him “my favorite player, “my pride,” But now she has refused to hand back the rights to her son’s name.

That decision has caused Don?i? to take legal action, claiming that he revoked her rights to his name in 2021 and that she “abandoned” any right to it because she is not selling any goods related to the trademark.

“This is the better legal claim because US trademark law requires ‘actual commercial use’ of a trademark to maintain any trademark registration,” Tweeted U.S. Trademark attorney Scott Gerben.

“I ultimately expect Luka to prevail in this matter.”

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