Sania, currently ranked 165th in the world, showed great determination to claw her way back into the match and register a 4-6 6-3 6-0 win over higher-ranked Jovanovski.
The singles title will come as a morale booster for Sania, who had lost in the doubles final yesterday.
Sania and and her Czech partner Vladimira Uhlirova lost 4-6 6-7(7) to German-Crotian combination of Julia Goerges and Petra Matric in the title clash.