Stosur seemed out of sorts throughout as the former world number one and triple major winner picked up her first title in almost a year.
But Stosur still feels her game is where it needs to be coming into Roland Garros, where last year she reached the final.
"It has been a great week and each week that I played here in Europe I think I have got a little bit better," she said.
"I guess it is what you want heading into a Grand Slam. This is a great event and I have played a lot of good matches.
"Overall I am very happy with the way I played this week. I played very good matches and obviously today was a little bit disappointing but going into Paris, there is nothing to do but go out and practice on court and work.
"It's a matter of maintaining this and trying to take a little bit of a break now and then practice and be as fit and healthy as I can before Paris."
The world number seven came into the final ranked one place above Sharapova but there seemed to be a gulf in class between the two.
It was Sharapova's eighth win in eighth matches against the Australian.
The Russian has won 22 titles to Stosur's two and the 27-year-old acknowledged that her opponent could be rediscovering the form that took her to the top of the rankings.
"I think recently she has started to play a lot better. After she came back, she struggled a little bit and her serve was a little shaky," said Stosur.
"But that has all been sorted out now and she plays very aggressively. I think that that last few months she has definitely improved a lot."
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