India's Sania Mirza, out of action because of a chronic wrist injury, has dropped eight places to 92 in the Women's Tennis Association (WTA) rankings released on Monday.
Meanwhile, Somdev Devvarman has climbed a place to 120 in the Association of Tennis Professionals (ATP) rankings.
Somdev, who is now playing in the qualifiers of Sony Ericsson Open, has a career-best ranking of 116.
US-based Indian Prakash Amritraj also climbed a place to 217th.
In the men's doubles rankings, Leander Paes and Mahesh Bhupathi remain unchanged at sixth and eighth place.