Novak Djokovic and Rafael Nadal -- vying for the world's top ranking -- powered through their openers at the China Open on Tuesday but women's top seed Serena Williams stumbled her way into the third round.
Serena Williams of the United States hits a return against Italy's Francesca Schiavone during their women's singles match at the China Open tennis tournament in Beijing, on October 1, 2013
Djokovic signalled his intent to reclaim the title he won in the Chinese capital last year, sweeping aside Lukas Rosol 6-0, 6-3. The Serbian world number one -- and top seed -- defeated his Czech challenger in just 53 minutes.
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