Apart from the established names of reigning world champion Carolina Marin of Spain, Shixian Wang, defending champion li Xuerui, and Yihan Wang -- all Chinese - Ratchanok Intanon of Thailand and Sung Ji Hyun of South Korea and the quick emergence of youngsters like India's very own double World Championship bronze medallist P.V. Sindhu, Japanese Nozomi Okuhara and Tai Tzu Ying of Chinese Taipei, means that no one is guaranteed success.