The world number eight Saina went down 16-21 14-21 to Yihan in 39 minutes. It was her eighth defeat to the Chinese.
Saina tried to put pressure on Yihan and was also successful in setting up the Chinese but she faltered with her strokes and could not finish off the points. Her strokes were inaccurate and lot of the retrieves got buried at the nets.
After the breather, Yihan continued her dominance and kept Saina at bay, riding on the Indian's inaccurate strokes.
Saina's taps were going to the nets and smashes out of the court. Yihan smashed one at the back court to earn four game points and then with Saina hitting out, she earned the bragging rights.
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Things didn't change much in the second game, as once again Yihan marched ahead to lead 11-4 with the help of her delayed taps and backhand returns.
Saina reeled off four straight points after the breather by engaging Yihan in rallies. But she started to dominate again with the help of her repertoire of shots. A few unforced errors and wrong judgements, and Yihan was leading 18-9.
The Chinese then made it 19-9 with the help of a cross court flick and soon enjoyed 10 match points at 20-10.
"I need to improve my fitness and net play. A few errors at crucial time cost me the match. I need to work on those mistakes before the Commonwealth Games and Asian Games," said Saina.