The following awards have been given to WTA players for 2010:
Kim Clijsters: Player of the Year
Justine Henin: Comeback Player of the Year
Maria Sharapova: Humanitarian of the Year
Flavia Pennetta/Gisela Dulko: Doubles Team of the Year
Petra Kvitova: Newcomer of the Year
I guess it was Serena Williams vs. Clijsters for Player of the Year but since Clijsters won 5 titles and played for the rest of the year, she won the award over Williams.