Real Housewives of Miami's Guerdy Abraira has shared an optimistic update on Martina Navratilova's health battle after the tennis legend was diagnosed with throat and breast cancer earlier this month.

Speaking to Daily Mail Australia this week to promote season five of RHOM on Hayu, Guerdy said that she reached out to her co-star, Martina's wife Julia Lemigova, as soon as she heard the news.

'Things are happening on their end, I don't know the exact details, but I know that they feel very confident,' the 43-year-old said.

'So it put me in a peaceful place where I know that hopefully everything will be okay,' she continued.

'And Martina texted and called me as well, I wanted to hear her voice and so forth. So I'm very happy for them that they actually are tackling it head-on and fast and furious, so it's looking good.'

Guerdy has been busy promoting the Real Housewives of Miami, which stars Martina's wife, Russian model Julia Lemigova.

While Navratilova isn't a full time cast member on the show, she has been featured in multiple episodes and her marriage to Lemigova has been a storyline. 

Earlier this month, the 66-year-old tennis player thanked fans for their support after she was flooded with messages from countless well-wishers.

She tweeted: 'Needless to say my phone and twitter are both blowing up so I will say again - thank you all for your support and I am not done yet.' 

Navratilova, Wimbledon's greatest ever singles champion, announced that doctors had diagnosed her with two forms of cancer after she discovered a swollen lymph node in her neck in November. 

The former tennis world number one's diagnosis comes after she was given the all-clear from a non-invasive form of breast cancer in 2010 following radiation treatment.

Navratilova, who won 59 grand slam singles and doubles titles in her 40-year career, will not travel to this month's Australian Open, where she was intending to work as a TV pundit.

But a statement from her representative described the prognosis as 'good'.

'Martina Navratilova has been diagnosed with stage one throat cancer,' read the statement. 'The prognosis is good and Martina will start her treatment this month.'

Navratilova, who became a U.S. citizen in 1981, discovered an enlarged lymph node while attending the season-ending WTA Finals in Fort Worth, Texas, and a biopsy showed early-stage throat cancer. While Navratilova was undergoing tests on her throat, the unrelated breast cancer was discovered.

Her representative added in a statement: 'The cancer type is HPV and this particular type responds really well to treatment.

'Martina noticed an enlarged lymph node in her neck during the WTA finals in Fort Worth. When it didn't go down, a biopsy was performed, the results came back as stage one throat cancer.

'At the same time as Martina was undergoing the tests for the throat, a suspicious form was found in her breast, which was subsequently diagnosed as cancer, completely unrelated to the throat cancer. 

'Both these cancers are in their early stages with great outcomes. Martina won't be covering the Australian Open for Tennis Channel from their studio but hopes to be able to join in from time to time by Zoom.'

The Real Housewives of Miami is currently streaming exclusively on Hayu in Australia