Sania Mirza slipped out of top-30 bracket after losing three positions to be 32nd in the latest WTA rankings issued on Monday.
Sania, who will open her campaign at the Qatar Open on Tuesday, however, maintained her doubles ranking at 23.
India's second best women player, US-based Sunitha Rao had her singles ranking intact at 182 though she lost one place in doubles to be 126th.
In the ATP list, the doubles duo of Leander Paes and Mahesh Bhupathi have maintained their top-20 positions at 15 and 19 respectively.