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.
Marin retired with an illustrious record, having won world titles in 2014, 2015 and 2018, seven European crowns and the Olympic gold at Rio 2016.
Her last competitive appearance came at the 2024 Olympics, returning after overcoming two anterior cruciate ligament tears in 2019 and 2021.