Tai, who has played with both knees in braces in Paris, had previously opened up about an issue with her left knee.
Star Indian shuttler Saina Nehwal's dream of winning her maiden All England Championship went up in smoke as the Indian suffered a straight-game defeat to World No. 8 Intanon Ratchanok of Thailand in the semifinals of the women's singles competition in Birmingham on Saturday.
The Indian ace fought back after losing the first game to beat Intanon Ratchanok of Thailand 18-21, 21-12, 21-18 at the Malaysian Open Grand Prix Gold badminton tournament.