Somdev Devvarman dropped out of top-100 and is placed 106 after losing 10 places on the ATP singles ranking chart on Monday.
Somdev had lost in the semi-finals of an ATP Challenger tournament in the US, last week.
India's doubles pro Mahesh Bhupathi improved his chances of a place in the World Tour Finals after claiming the sixth position in the team ranking along with Belarusian partner Max Mirnyi.
They displaced Rohan Bopanna and Aisam-ul-haq Qureshi, who are now seventh and are also in hunt for a place in the season-ending finale.
In the individual doubles rankings, Bhupathi gained two places to be in 13th position. Leander was static at number five while Bopanna slid to 15, loss of one slot.
In the WTA chart, Sania Mirza (166) dropped a place in singles and was unmoved in doubles at number 64.
Somdev ousted from ATP Farmers Classic
Bopanna leaps to 19 in ATP doubles rankings
Sania-Edina win doubles WTA title
Bhupathi gets engaged to Lara Dutta
Somdev back in top-100 in singles rankings