The men's singles at the 2011 Dubai tennis tournament was won by Novak Djokovic.
The women's singles at the same tournament was won by Caroline Wozniacki.
There is no "2012 open tennis tournament".
Novak Djokovic won the 2009 Barclays Dubai Tennis Championships.
He's won a total of six times as of the 2011 tournament (2005-2011, except for 2009).
Novak Djokovic won the 2009 Barclays Dubai Tennis Championship.
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Rafael Nadal won the tournament. Novak Djokovic was the runner-up.
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