P V Sindhu. Pic/AFP

Olympic silver medallist P V Sindhu says losing close matches from advantageous position dealt a blow to her confidence and she is looking to overcome it by working on the mental aspect of her game. Sindhu achieved unprecedented success in the last couple of years but she also lost some heart-breaking losses in the finals of 2016 Rio Olympics, 2017 World Championship, 2017 Dubai Super Series Final and India Open this year. "I have lost matches were I am leading. I know physically and mentally at times when you lose such matches it hits you, but we have to comeback stronger to ensure that it doesn't happen again," Sindhu said after ekeing out a thrilling win over Japan's Nozomi Okuhara to enter the semifinals of the All England Championship here.