Saina Nehwal admitted to hospital for knee treatment

"Saina has been hospitalised for the last two days and is undergoing treatment for her injury, which got worse during her match against Marija at Rio Olympics," Saina's father Harvir Singh told PTI.

After struggling with injuries at the start of this year, the 2012 Olympic bronze medalist went into Rio on the back of her emphatic triumph in the Australian Super Series. She even defeated World No.2 Wang Yihan in straight-sets on her way to the final, and it looked like the Haryana-born shuttler was back to her best.

She was the fifth seed in the women's singles draw, and her Olympic campaign got off to a fantastic start with an easy win over Lohaynny Vicente. However, the former World No.1 suffered a shock defeat in her next group match against World No.61 Marija Ulitina in straight-sets, and exited the tournament in the group stage itself. Her coach later said that a knee injury was responsible for her below-par performance.

Her father said that the details of her injury has not been revealed yet, and that Saina will fly to Mumbai to receive further treatment.

"The doctors have not revealed the contents of the MRI scan to me. I will be able to talk about it tomorrow, not today.

"The doctors here have referred her case to a hospital at Mumbai, and she will be flying from Hyderabad," he said, reported PTI.