TENNIS great Monica Seles revealed she has been diagnosed with a rare muscle-weakening condition.

Seles, 51, started experiencing double vision and extremely depleted strength in her arms and legs in 2019.

A long string of tests and scans - delayed by the Covid pandemic - ruled out brain tumours and motor neurone disease.

The nine-time Grand Slam champion was eventually diagnosed with myasthenia gravis (MG) in 2022.

Now Seles has gone public on neuromuscular autoimmune disease - which currently has no cure - and will raise awareness for the condition with an event around this month's US Open.

MG affects most of the body but particularly the muscles that control the eyes - although symptoms can vary from day to day.

Approximately 15-20 people per 100,000 - or 0.015 per cent of the pop

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