Juan Martin Del Potro defeated Roger Federer in five sets in '09
Nadal
Nadal
Svetlana Kuznetsova, Russia
Rafael Nadal won the tournament. Novak Djokovic was the runner-up.
Maria Sharapova
There is no "2012 open tennis tournament".
Rafael Nadal won the men's singles and Maria Sharapova won for the woman
Kim Clijsters.
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.
Milos raonic of canada
Kim Clijsters
Chris Evert won the US Open 6 times, the only person to do so.