It is pretty interesting how many of the top players are from the US. And if Monica wasn't injured, then she'd definitely be up there as well.
I often wonder why this is...I don't think that tennis particularly more popular here than other countries. I mean, look at the UK...the home of Wimbledon, considered the mother of all slams...and they don't have that many top players (none if you just look at the women). Is the USTA being THAT effective at the local level?! I don't know. I also don't think the US has more public courts than, say, Australia. But maybe the resources are better here. Maybe for the serious youngsters, they have more access to better training and facilities. I don't know.
Anyhow, it's great to see so many successful women's tennis players. And amazing about Belgium!!!