India's ace shuttler and London Olympics Bronze medalist Saina Nehwal will clash with Ratchanok Intanon of Thailand in her must-win second Group-B match of the BWF Superseries Finals at Shenzhen in China today. Saina, who is seeded fourth in the competition, yesterday lost her opening Group match against Tine Baun of Denmark, 14-21, 21-11, 19-21.