The most undisputed ITF POY since Henin in for 2007?
Kvitova last year was close to as undisputed. Serena of 2012 > Kvitova of 2011 by a big margin, but Azarenka of 2012 > Wozniacki 2011 by a big margin too. Either ways Kvitova (2011) and Serena (2012) was way ahead of the #1 ranked player. Henin in 2007 was about five times further ahead of second best than either Kvitova in 2011 or Serena in 2012 though.