Emma Navarro opens up on health battle behind court anger

Emma Navarro has revealed the hidden health battle that changed the way she felt, trained and competed on court. The American tennis player says she has now gained her “life back” after years of unexplained fatigue, weight loss and emotional strain that eventually led to diagnoses of RED-S and Hashimoto’s hypothyroidism.

The 25-year-old, who reached the semi-finals of the US Open in 2024, said the warning signs were there long before the full picture became clear. What once looked like a rapid rise through the rankings was, behind the scenes, being shaped by a body that was struggling to keep up with the demands being placed on it.

A breakthrough career, but growing warning signs

Navarro’s rise in women’s tennis had been one of the brighter American storylines of recent seasons. She climbed as high as eighth in the world in 2024, reached the quarter-finals at the Australian Open and Wimbledon, and made a memorable run to the last four in New York.

She also ended a title drought by winning the Strasbourg Open in May, her first trophy in more than a year. But even while the results were impressive, she later admitted her body was sending signals that something was not right.

The physical toll became impossible to ignore

According to Navarro, she lost around 14 kilograms across 2023 and 2024, and began dealing with headaches, dizziness, brain fog and persistent fatigue. She said the symptoms slowly grew worse, even as her professional progress continued to rise.

In a detailed Instagram post, Navarro explained that she had been pushing herself to the limit and believed that relentless effort was simply part of becoming a professional athlete. “Being new to professional tennis, I was doing what my team and I thought was best,” she wrote. “Pushing myself to the limit was always my MO.”

That mindset delivered short-term success, but it also masked a deeper issue. Navarro said she eventually learned she had been under-fuelling for almost the entire period, which contributed to RED-S, a condition linked to low energy availability, and later to Hashimoto’s hypothyroidism, an autoimmune disorder that affects thyroid function.

What the diagnosis explained

The diagnosis helped make sense of a difficult stretch that affected both her physical condition and emotional state. Navarro said she experienced “deep internal anger” on court, along with irritability, frustration and unusual mood swings that made competition feel more draining than ever before.

“I remember feeling deep internal anger on the court that week in Hobart,” she said, referring to her breakthrough WTA title run in Australia. “Everything began to annoy me. My team, other people, anything that didn’t align with my specific preferences or routines.”

Even the wins came with a cost. She described being hungry “every hour of the day” and said she was constantly trying to hide how she felt from others, even as the discomfort built up. That contrast between outward success and private struggle has become the heart of her story.

Recovery, perspective and a fresh start

Navarro said her path to recovery began only after she started working with doctors, nutritionists and other specialists. Once the underlying issues were identified, she could finally stop treating the symptoms as isolated problems and begin addressing the cause.

That process has already brought a major personal change. “I gained some weight this year. But I also gained my life back,” Navarro wrote. “I have enough energy to seize every day, to train or compete as hard as I want to, and to live a life outside of tennis.”

Her decision to step away from the Asian swing as part of her recovery underlines how seriously she is taking the next phase of her career. For an athlete who once seemed to be accelerating at full speed, the reset may prove just as important as any title run.

Why Navarro’s story matters beyond tennis

Navarro’s openness also shines a light on a wider conversation in elite sport: the difference between being successful and being healthy. In individual sports, where performance can mask physical decline, the pressure to keep winning often makes problems harder to spot.

Her comments serve as a reminder that progress is not always linear, and that the strongest athletes are not always the ones who ignore warning signs. Sometimes the biggest turning point comes only after stepping back and listening to the body.

For Navarro, that turning point has brought clarity, relief and a renewed sense of control. The rankings, the titles and the big-stage moments remain part of her story, but for now, the bigger victory is simply feeling well enough to enjoy the game again.