Sania Mirza's second-round exit at last week's DFS Classic saw her slip four places to 46th in the singles chart of the WTA rankings issued on Monday.
Sania, who will now be seen in action at the USD 175,000 Ordina Open in Holland, has 540 ranking points.
The 20-year-old will open her campaign at the Tier-3 grass court event against Italian Francesca Schiavone.
The Indian ace has also slipped a rung to 42nd in the doubles chart with 976 points.
In the ATP charts, a hat-trick of ITF Futures titles saw Prakash Amritraj jump 66 places to 498th in the latest rankings.
In doubles, Leander Paes has improved his standings by one place to be ninth this week with 4000 points. Paes and his Czech partner Martin Damm lost in the semi-finals of Gerry Webber Open in Germany last week.
Mahesh Bhupathi, meanwhile, remained static at 20th with 1815 points. Bhupathi had a disappointing week, bowing out in the second round of the men's doubles event at the Stella Artois Championship.
