Other than Myskina, I see only 1 other Russina with top 5 potential. And her name is Maria Sharapova. But a few of them do appear to be top 10 material. I can see as many as 8 Russina's in the WTA top 20 in the near future with 3 Russina's in the top 10 at the same time.
We really can't ask for much more than that the the Williams sisters and the top 2 Belgians on the WTA scene.
ys, Myskina is top 5 material because she's almost in the top 5. I know she took advantage of the absence of the Williams sisters. But so did everyone else. Especially Justine Henin.