"It will be tough maintaining the number one ranking, but people should respect that I have been the first one to reach number one slot," Saina told PTI in an interview.
"If everything falls well in line and if I train well, then I am sure I can maintain it for a long time but it is not going to be easy I have to work very very hard. I have to keep in mind everyday I am world number one and have to work as world number one. I will try my best to win as many titles for my country," she said.
"All are threat to me. Right now, I cannot comment on one person. Li Xuerui is the top contender because she has less number of tournaments compared to others, so she has the chance to go on top again," she said.
Asked whether her former coach P Gopichand called her after becoming world number one, Saina said there has been not much of a conversation with him except during the tournaments.
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"Being my coach for so many years, he tells so many good things and wishes me best but sometimes when you go to a different place, differences do happen. It is not so easy to be the same coach and trainee. He is doing his things now and I am doing mine. Everything is going fine and that is important," she said.
Asked what went wrong with Gopichand as her coach, Saina said their off-court planning was not fructifying on the court as she was losing to best players like China's Li Xuerui.
Saina further said not every coach can read the game properly and may not know how to improve from one stage to another.