Caroline Wozniacki shares her fight with rheumatoid arthritis in Citibank video 

Caroline Wozniacki hung up her racquets following last year's Australian Open, but she isn't done vying for change and using her platform to take a stand. In collaboration with Citibank, the former world No. 1 shared her empowering story and gave advice to aspiring athletes in the "On My Terms" video.

Wozniacki overcame not only the opponents standing across the net during her career, but took on doubters and a challenging fight with rheumatoid arthritis.

With others in mind battling chronic inflammatory diseases, she co-launched Advantage Hers, which helps women gain access to the right doctors, treatment and help they need. The idea was inspired by Wozniacki's own painful experience of having doctors and medical advisors dismiss her symptoms. As a world class athlete, the Dane couldn't get the help she needed, leaving Wozniacki to ponder about the women walking in different shoes.

“I thought to myself, if I’m not being taken seriously, and I’m supposed to have great doctors just taking care of athletes, the normal woman coming into the doctor is definitely not going to be taken seriously,” Wozniacki said in the Citibank feature video.

Her grit and determination to prevail is inspiring others to pull through and do the same. The former world No. 1's global campaign involves both women and men telling their stories and pushing for self advocacy.

The 2018 Australian Open champion looks forward to seeing others in her growing community chase after their ambitions and offered a piece of advice to everyone looking to turn dreams into reality.

“You need to want this and be willing to work extremely hard," Wozniacki said. "If you're willing to put in the hours, if you're willing to do what it takes and work hard, then the sky is the limit."