Saina's coach Pullela Gopichand, too, is hopeful that she would be fine for the elite event.

'She was not feeling well since Saturday. She is under treatment for the last four days. There is still some time left for the tournament and we are hoping that she will recover,' Gopichand said.

'It is not an ideal situation, but you can't do much about these things. She is taking all precautions and hopefully she will be fit for the worlds.'

Saina is India's biggest hope in the elite event. She had been riding high on form and won her maiden Super Series event in Indonesia last month.

The 19-year-old, who has got a bye in the first round, is banking on her home advantage to put up a strong performance.