A self-contradictory poll
This is going to be a quite weird poll, as it outcome will contradict itself. Suppose that a player XX "wins", i.e. she's been voted the "most overrated" WTA player this year. This will show that XX is rated low by this forum. If she happens to be high-ranked (and remember that the ranking reflects players's on-court results and not subjective opinions) - then she'll be proven to be strongly underrated
, at least by this site.