New Delhi, Aug 17 - India's No.1 Somdev Devvarman slipped 23 spots to be at 163rd position in the Association of Tennis Professionals (ATP) men's singles rankings, released Monday.

Somdev's compatriot Prakash Amritraj moved up seven places to be at 254th position.

In the men's doubles rankings, Mahesh Bhupathi, who with his Bahamian partner Mark Knowles won his fifth Rogers Cup doubles title, gained a spot to be a eighth position while Leander Paes is down a place at seventh position.

In the women's singles, Sania Mirza is static at 74th position though she climbed three spots in the doubles ranking to 46th position.