Tennis

Who was ranked year-end No. 1 in men's tennis in 2015?

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Which of these tennis stars is from the USA?
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Who did Mats Wilander defeat for his first Grand Slam Victory?
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Who won the 2015 ATP World Tour Masters 1000 Canada?
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When is the ball considered 'out'?
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Who won the 2015 Hamburg European Open?
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Where was tennis great Michael Chang born?
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Which athlete is known for their accomplishments in tennis?
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Who was the winner of the women's singles at the Australian Open in 2016?
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