Ace Indian shuttler Saina Nehwal faces the risk of losing a semi-final berth in the BWF World Super Series Finals after her second consecutive defeat in the women's singles Group B match in Shenzhen, China today. The world number 3 Indian surrendered 13-21, 16-21 to Ratchanok Intanon of Thailand, a day after Denmark's Tine Baun stunned Saina 14-21, 21-11 ,19-21 in her tournament opener. Saina will now have to win big when she next plays world number 4 Juliane Schenk of Germany. She will also have to keep an eye on the outcome of the other group matches to keep her semi-final hopes alive.