Nine-time grand slam champion Monica Seles has revealed that she was diagnosed with myasthenia gravis — a neuromuscular autoimmune disease — in a recent interview with The Associated Press.

Nine-time Grand Slam champion Monica Seles is battling a new challenge: a neuromuscular autoimmune disease called myasthenia gravis. The 51-year-old Seles is going public about the condition she was diagnosed with three years ago.

Tennis legend Monica Seles shared that she has been diagnosed with myasthenia gravis, an autoimmune disease with symptoms she first noticed while doing what she loves the most — playing tennis.