World No.3 Jelena Jankovic has signed a two-year contract with Serbian company Knjaz Milos. In particular, the tennis star will promote their famous water called Aqua Viva.
Jankovic stated that she will be faithful advocate of Knjaz Milos’ brand through her tennis successes.
Current world No.1 Ana Ivanovic was also the promoter of Aqua Viva. You can see the commercial with Ivanovic here.
BTW: Jankovic is currently on the Serbian mountain of Zlatibor with her family where she's planning to heal her injuries and forget about tennis (probably more than anything she’ll try to overcome her loss to compatriot Ana Ivanovic). JJ will skip all the tournaments prior to Wimbledon, including the DFS Classic, the tournament where she was supposed to defend her title. (sources: Jelena Jankovic's website, Mondo)