character: Serena Williams
topic: Dietary Supplements in Tennis
grade: 10
subject: Physical Education
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character: Novak Djokovic
topic: Nutrition and Performance in Tennis
grade: 10
subject: Physical Education
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character: Roger Federer
topic: Athletic Training and Supplements
grade: 10
subject: Physical Education
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character: Maria Sharapova
topic: Impact of Supplements on Tennis Players
grade: 10
subject: Physical Education
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