For Australian Stosur, who exited the women's single draw in the first round, it was a second Wimbledon title after she won in 2008 with Bob Bryan.
Zimonjic is part of Serbia's Davis Cup team and had earlier watched team mate Novak Djokovic claim the men's singles title before laying claim to some silverware of his own on Centre Court.
"This was kind of a feeling like playing the Davis Cup, watching Novak play and then being ready to step on the court," Zimonjic said.
Image: Samantha Stosur and Nenad Zimonjic
Photograph: Matthew Stockman/Getty Images
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