Photo Credit: Petr David Josek/AP

Cereal giant Kellogg’s is suing tennis player Thanasi Kokkinakis over his use of the nickname Special K in his native Australia.

Kokkinakis—the doubles partner of Nick Kyrgios—has plans to use his nickname on a line of tennis gear and other clothing, according to the Adelaide Advertiser. But the cereal company has now taken action against him in federal court, nearly a year and a half after they first tried to block the 21-year-old by lodging opposition against the trademark.

Kellogg’s has had the Australian trademark on the term “Special K” for 59 years.

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The Advertiser notes that Kokkinakis’s other nickname is “Kokk,” so it makes sense that he chose to try marketing “Special K” first here.

[Adelaide Advertiser]