Former World No. Caroline Wozniacki announced her intentions to retire from competitive tennis after one last trip to Australia in January on Friday, and tributes from her WTA family have been pouring in on social media.

Read more: Wozniacki to retire following Australian Open

Some of Wozniacki's WTA peers, including Donna Vekic, Heather Watson, Laura Robson, Elena Vesnina and Lucie Safarova could be found commenting messages of support on the Dane's Instagram announcement, while others took to their own social media to react to the former World No.1's big news. 

Whatever the medium, the theme of all the messages was clear: each lauded the Dane's career, which lasted nearly two decades, saw her reach the World No. 1 ranking for 71 weeks, and win the 2018 Australian Open.

In addition to social media posts from her peers, Wozniacki also penned a viral heartfelt letter to her younger self at The Players' Tribune, where she reflected on her youth as the daughter of Polish immigrants in Denmark who went on to become one of the best players in women's tennis. 

In photos: Wozniacki's World: 10 top moments from a glittering career

"There are so many amazing things that lie ahead for you. Savor each moment — not just the victories, but also the experiences, the relationships, the emotions. And when times get tough, look to your family for support. They will always be there for you," she wrote.

"Work hard. Find what you love and then be the very best you can be at it. But, most importantly, always treat people well. Be a good person, first and foremost."