Somdev Devvarman dropped out of top-100 as he is placed 106 after losing 10 places on the ATP singles ranking chart on Monday.
Somdev had lost in the semifinals of an ATP Challenger tournament in the US, last week.
India's doubles pro Mahesh Bhupathi enhanced his chances to be 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.