Tributes have been pouring in for Martina Hingis from her WTA peers, after the Swiss legend announced her retirement during the BNP Paribas WTA Finals Singapore presented by SC Global.

Hingis was honored in a retirement cerermony on Sunday in Singapore, in which WTA President Micky Lawler delivered a speech, and WTA CEO Steve Simon presented Hingis with a commemorative plaque celebrating her career.

Current and former WTA players wished Hingis well on social media, with messages coming from former doubles partners Sania Mirza and CoCo Vandeweghe, to USTA CEO Katrina Adams and Judy Murray among others.

Read more: Hingis showed me how to be a champion, says Federer

The 37-year-old Hingis ends her career on top of the world: as the year-end No.1 alongside Chan Yung-Jan.

Behind the Numbers: Martina Hingis' spectacular career

Chan and Hingis lifted a tour-leading nine trophies in 2017, including their maiden Grand Slam title as a team at the US Open, and reached the quarterfinals or beter in all the events they played together.