Monica Seles, the nine-time Grand Slam champ who once dominated the court with her signature two-handed style, is facing a new kind of opponent — and this one isn’t standing on the other side of the net.

The 51-year-old International Tennis Hall of Famer recently revealed she’s been quietly battling myasthenia gravis, a rare neuromuscular disease, for the past three years.

“It took me quite some time to really absorb it, speak openly about it, because it’s a difficult one,” Seles told the Associated Press . “It affects my day-to-day life quite a lot.” 5

The tennis legend broke her silence just days before the 2025 US Open kicks off in Flushing Meadows, hoping to raise awareness about the chronic condition she’d never heard of until it landed in her own court.

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