Saina was leading 20-17 in the decider and was serving for the match when a line call, which looked clearly out, went in Hashimoto's favour, and the world number two and top seed Indian squarely laid the blame for here defeat to the controversial decision.
"I was really upset with line call and could not focus after that. It was quite bad as I failed to find my rhythm after that. I just could not control after that and it was totally my mistake," she said after losing her second round match.
The London Olympics bronze medallist went down to Yui Hashimoto of Japan 21-13 12-21 20-22 in the women's second round at the Siri Fort Sports Complex here.
"I tried my best today to pull off the match but that did not happen. The line call was not with me ... It's okay," said the top seeded shuttler.
World number two Saina said after the line call, she hardly got time to get back into momentum.