Originally Posted by Potato
Hingis, and current Serena are a few that come to mind.
Radwanska is smarter than most players, but I don't think she's brilliant. Just because you use drop shots and are underpowered does not mean you have a high tennis IQ.
I don't like her very much, but she's clever as hell. She moves the ball around really well but isn't predictable, and her shot selection gives players fits. Plus she's extremely good at sensing her opportunities to come in. You rarely see her come to net on bullshit approach shots like most other WTA players.