Tennis ace Sania Mirza has risen a couple of rungs to 90th in the latest WTA singles rankings issued today. Sania, however, slipped in the doubles chart and was down to 44th from last week's 36th. Leander Paes, who clinched his maiden doubles' title of the season with Czech Lukas Dlouhy in Miami Masters, remained static at sixth in the ATP list. Mahesh Bhupathi gained a spot to seventh in the doubles rankings.