Sania Mirza just about managed to remain in the top-50 bracket following her first round loss in the USD 585,000 women's tennis event in Los Angeles last week.
Sania, who had reached her career high ranking of 48 a week ago, slipped two places to be at 50 in the latest WTA Tour rankings released on Monday.
The 18-year-old Indian became the first Indian since Ramesh Krishnan in 1980s to break into top-50 in world rankings.
The Hyderabadi has opted out of the 1.3-million-dollar event she had planned to play in Toronto this week as she recuperates from a stomach muscle pull.
She is expected to play in the USD 75,000 Forest Hills Classic next week, the last event ahead of the US Open Grand Slam beginning August 29.
Also see: Sania Mirza homepage