Andrea Petkovic, former Backstreet Boys fan, delivers strong Twitter Q&A

No. 18 Andrea Petkovic, who this week is playing the Bank of the West Classic for the first time, took to Twitter on behalf of the tournament for a fan-driven Q&A on Tuesday. The 26-year-old German -- known for her sharp sense of humor and refreshing candor -- did not disappoint. From books to music to her "kinky" relationship with Ana Ivanovic, here are some of the best exchanges from the session: 

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