Saina shocked Xin in her own den during the Sudirman Cup and it was only second defeat for China in the event after Germany's Juliane Schenk shocked the top-ranked Wang Shixian.
"It's good that nowadays a lot of players are coming in to beat the Chinese - not only me, but I also think Juliane Schenk and Tine (Baun, of Denmark). The Thai players and Japanese are also doing very well," Saina said.
"We are all training very hard and I think now everyone is believing they can beat the Chinese, so I think the road is quite open now," she was quoted as saying by media in Qingdao, China.
The young Indian player said the recent success of many Asian and European players players has made the Chinese nervous.