Not long after longtime rival Maria Sharapova guest-judged on Shark Tank, fellow entrepreneur and fashionista Serena Williams will do the same on the season 18 finale episode of Project Runway.

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Williams' model-pal Karlie Kloss, a girls-in-coding advocate and host of Runway, had her way with the tennis puns ahead of her friend's appearance.

On Thursday night, Williams will evaluate the four finalists' high-stakes collections, as seen via the above preview. Get ready for game, set, rack.