Carla Suarez Navarro says she thought she had COVID-19 before being diagnosed with Hodgkin lymphoma last year.
The Spanish fan favourite stunned the tennis world in September when she announced the devastating cancer diagnosis.
‘NOT WELL ENOUGH’: Nadal's shock admission ahead of Aus Open
‘GREAT CONCERN’: 'Troublesome' detail in Aus Open virus case
The former World No.6, known for one of the best backhands in tennis, had already decided earlier in the year to retire.
But this was not how she wanted to bow out.
When Suarez Navarro had stomach pains and sickness she suspected it was COVID-19.
But tests showed the news was far worse than she could have imagined.
The 32-year-old was diagnosed with Hodgkin lymphoma and would need months of chemotherapy.
A few months on and she has made a strong recovery, targeting a proper farewell to the sport at the re-scheduled Tokyo Olympics.
Suarez Navarro completed her chemotherapy in January, a milestone moment after her life was turned upside down.
Recalling the events leading up to her diagnosis in an interview with Eurosport's Players' Voice series to mark World Cancer Day, the 32-year-old said: “I had a PCR test to check if I had coronavirus which came back negative, then I went to the doctor because I had stomach pains.
“I kept feeling unwell so we went to see more doctors until one of them spoke about the possibility of lymphoma but we had to wait for the results.
“I was having tests and biopsies done all over my body until they finally gave me the bad news.”
Her initial reaction was wanting to know how she could recover.
“Truth is I don't know what I thought,” she said.
“I didn't ask questions about the disease, why I had it or what was going on - I just wanted to know what I needed to do to recover.”
Suarez Navarro targeting proper farewell in Tokyo
Suarez Navarro, who last played in Doha last February, said the mental toughness she has always exhibited on court helped her deal with the challenging months of treatment.
“I didn't know how my body would react to a new and unprecedented situation like this one, so there have been days which I have found physically very hard but mentally, I've handled it very well,” she said.
“Tennis is an individual sport and we are used to dealing alone with recovery.”
The Spaniard admits she is not missing the jet lag associated with travelling to the Australian Open, but does miss her friends on Tour and competing.
Her plan is for a swansong at the Tokyo Olympics, although knows she must first make the team.
“So in my mind, if all goes well, I am hoping I can say goodbye the way I want to,” she said.
“It's not up to me and it will depend on the rankings; for singles there can only be four players in the draw so if Garbine (Muguruza), Paula (Badosa), Sara (Sorribes) and Aliona (Bolsova) do well at the start of this season, I'll be out.
“However, I hope if Garbine has a good ranking in doubles, we can play together.”
Click here to sign up to our newsletter for all the latest and breaking stories from Australia and around the world.