According to b92.net, it will be Ana Ivanovic, Ana Timotic, Ana Veselinovic and Danica Krstajic. Jelena Jankovic will not play.

I don't know about this... Jelena is in poor form now but she's always given her all in Fed Cup and that could have helped her to regain her confidence.
And yet again we don't have a good 2nd player... Timotic has been bad this year, Danica has has a very disappointing season so far and Veselinovic is very inexperienced.
I don't think we'll go through.