The Suresh Raina wallpaper is a solid piece of work, however the fact that his body is half cut off really takes away from it. To work with wallpapers, you ideally need full body shots of players - and if they are only half body you are limited to putting the render down in the bottom only.
The Rahul Dravid wallpaper is interesting - I'm not sure if I like it. The render isn't great but it still works solidly. The text at the bottom is average.. I don't really know how to judge it. It looks quite different to say the least.. anyway, you are still doing well.
Keep up the work on your graphics anyway - you are improving quickly and I am interested to see more of your stuff.