NORCROSS, Georgia (CNN) -- Beneath seven flat-screen TVs and one large pulldown screen, members of the Racquet Club of the South gathered Monday to watch and celebrate one of their own. Members of the Racquet Club of the South erupt when Melanie Oudin beats Nadia Petrova. Melanie Oudin, 17, of Marietta, Georgia, has taken the tennis world by storm at the U.S. Open. The 70th-ranked female has upset some of the sport's biggest female stars, including Russian aces Elena Dementieva (No. 4 seed) and Maria Sharapova (No. 29 seed, who has been ranked No. 1 worldwide in the past). And on Monday, she beat 13th seed Nadia Petrova in three sets.
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Melanie Oudin, 17, moves into quarterfinals with latest win
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Oudin caused hubbub when she beat former No. 1 Maria Sharapova on Saturday
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Oudin honed her skills at the Racquet Club of the South in Georgia
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Fellow members are as impressed by positive attitude as by her talent
They booed when they saw @placeholder losing her cool, banging her racquet against the net after losing a big point.