Which athlete's Instagram post became the first sports influencer content to generate over $1 million in direct attributable sales within 24 hours?

The world of sports marketing has been revolutionized by athlete influencers who can drive brand engagement through their massive social media followings. Major sporting goods companies now allocate significant portions of their marketing budgets to influencer partnerships. This trivia question tests your knowledge about a landmark moment in sports influencer marketing that changed how athletic brands approach digital strategy.

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Cristiano Ronaldo's 2019 Nike Mercurial boot launch
LeBron James' 2020 Space Jam merchandise reveal
Serena Williams' 2018 Nike 'Queen Collection' announcement
Michael Phelps' 2016 Under Armour Olympic campaign