Saina said that she now targets the top ranking place.
"I am happy to regain my position as number two in the world ranking. After All England, I knew I will become the number two this week.
"I will work hard and try to become the world number one soon," Saina said.
She has 74,381 points, 4,833 short of World No 1 LI Xuerui of China (79,214). Another Chinese, Shixian Wang, is ranked No 3 (72,227).
Young shuttler PV Sindhu, who had missed the All England due to an injury, retained her number nine position.
Among Indian male shuttlers, K Srikanth regained his number four position, improving one spot, while P Kashyap retained his 12th spot in the latest ranking.
There are no Indians in the top 20 of men's doubles and mixed doubles category.