Saina had to settle for a bronze after losing to Japan's Nozomi Okuhara in the semifinals and Vimal put the blame on the poor scheduling of the matches at Glasgow.
"I feel sad for Saina. She didn't get enough time to recover for the semifinal match. She had a late quarterfinal match and then she had to play in the morning. I think the overall scheduling was a problem," Vimal told PTI from Glasgow.
"Even Chen Long and Srikanth had late matches and had to play in the morning. It is the World Championship and it can't be compared with any other tournament. For big events such as World Championship, Olympics, it is important to have perfect scheduling," he added.
Vimal gave a lot of credit to Japan's Okuhara for her win over Saina.
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"Saina had a good track record against Okuhara and she won the first game playing at a good pace. She is extremely good in slow conditions. She always tries to tire out her opponents and then counter attack," he said.
While Saina settled for a bronze, P V Sindhu had to be contend with a silver medal after losing a nail-biting marathon battle against Okuhara.
Talking about the epic final between Sindhu and Okuhara, the former India chief coach said: "It was a classical match and there were no losers by the end of it. Sindhu perhaps should have taken the first game. But overall both the girls performed really good."
Vimal reiterated that Saina and Sindhu showed that they are among the best in the world.
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