India, March 27 -- PV Sindhu paid tribute to Carolina Marin after the Spanish shuttler announced her retirement. Sindhu took to social media on Friday, writing a heartfelt message for Marin, with whom she also had a controversial on-court altercation. A former world No. 1, Marin shared one of modern badminton's most intense rivalries with Sindhu, and the pair produced several thrillers.

She famously defeated Sindhu in the final of the Rio 2016 Olympics and again in the summit clash of the 2018 World Championships.

Taking to X, she wrote, "Some rivals become part of your journey forever. Carolina was one of them. We first played each other when we were 15 or 16 year old girls in the Maldives, and from then on we went on to share so many ...