New Delhi: Riding on her semifinal finish at the Japan Open Super Series, Saina Nehwal on Thursday improved a rung to be placed fourth in the latest world badminton ranking.

While the 21-year-old Saina was stunned by Germany's Juliane Schenk in the last-four stage in Japan, she could not advance beyond the quarterfinals of the World Badminton Championship and China Masters.

Commonwealth Games bronze medallist P Kashyap and Ajay Jayaram, who had a decent quarterfinal finish at the world championship, also surged one place ahead in the ranking to be placed 22nd and 24th respectively.

Jwala Gutta and V Diju, who reached the semifinals of China Masters, zoomed six places to 29th place, while Jwala and Ashwini Ponnappa were in 16th position, improving two places in the latest ranking.