New England Patriots tight end Rob Gronkowski and apparel giant Nike are engaged in a dispute over the former’s personal logo.

Gronkowski’s company, Gronk Nation LLC, developed a logo depicting the tight end spiking a football into the ground, pantomiming one of his most famous celebrations. Gronk Nation filed a trademark in April 2016 for the logo.

Nike is claiming that Gronkowski’s logo is far too similar to the Jordan brand Jumpman logo, filing its opposition to the USPTO Trial & Appeal Board.

If Gronkowski’s team doesn’t formally respond by Aug. 5, it could lose its trademark filing.

“My client has created one of the most recognizable brands in sports today,” Gronkowski’s attorney, Troy Carnite, said via ESPN’s Darren Rovell. “We are very proud of this brand and are optimistic that we will resolve this with Nike amicably.”

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