Tennis

When the serve is not within the boundaries, what is it called?

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Who was Nicolas Mahut's doubles partner at Wimbledon in 2016??
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Lady tennis pro Klara Koukalova represents which country?
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Na Li's first win outside of China occurred in which country?
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Which of the following is considered bad tennis etiquitte?
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In what country was tennis pro Simona Halep born?
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Which player was known as "Boom Boom" when he first entered professional tennis?
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Which tennis pro won the 2017 Hamburg European Open?
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Li Na announced her retirement from professional tennis in September 2014 due to what recurring injury?
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