There is no "2012 open tennis tournament".
Rafael Nadal won the tournament. Novak Djokovic was the runner-up.
Rafael Nadal won the US Open in 2010 for men's singles
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.
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Chris Evert won the US Open 6 times, the only person to do so.
Wimbledon, Us Open and A few more I think.