Soon after PV Sindhu demolished world number six Nozomi Okuhara of Japan in straight games to enter the final of the badminton final at the Rio Olympics, coach Pullela Gopichand said the last few days were nerve-racking.Gopichand, who had coached Saina Nehwal to a Bronze medal at the London Games in 2012. This time, the former Indian shuttler was in charge of Sindhu, who has assured India of a Silver medal. She will of course play Carolina Marin for Gold on Friday and hopes are high she would be able to do it.It was a tense semi-final on Thursday, but Sindhu, aided by Gopichand at every break, kept her cool. The first game was a test of patience and skills and the Indian world number 10 came up on top. There were several close scarps but Sindhu held her nerves to take the game 21-19.’SLEEPLESS NIGHTS’ Her Olympic journey so far tested the nerves of the bravest of the lot. The normally unflappable Gopichand, who was a calming influence on Sindhu, admitted to spending sleepless nights at Rio.”The last few days reminded me of my career. I wasn’t able to sleep,” Gopichand said, who also added that he did not smile for two months.The Indian badminton coach knows the enormity of the task that lies ahead of his ward tomorrow.Naturally, expectations have soared in the country, which only ended its medal draught in Rio in the early hours of Thursday morning, India time when Sakshi Malik won Bronze in a thrilling encounter.advertisementBut Sindhu’s father, elated as he was, said his daughter’s final opponent should not be underestimated.Meanwhile, Nita Ambani, who became the first Indian woman to be elected to the International Olympic Committee, was in Rio to congratulate Sindhu after she stormed into the Gold medal match.”It’s with great pride that I stand here today. Sindhu and Sakshi have shown what potential India have in sports. More power to girl children,” she said.