Former No. 1-ranked Jankovic had lost three of her four previous matches against Pavlyuchenkova. After a poor opening set, the Serb earned three service breaks in each of the next two sets.
Ivanovic downed Flavia Pennetta 7-6 (9), 6-1, while Jovanovski beat Sorana Cirstea 6-3, 6-2.
In the men's draw, Australia's Bernard Tomic opened with a 7-6 (4), 6-4 win over China's Zheng Ze.