At the age of 19 former British tennis number one Elena Baltacha was diagnosed with primary sclerosing cholangitis, a chronic liver condition which affects the immune system.
Elena managed the condition throughout her career with medication and regular blood tests. She went on to win 11 singles titles.
She has been a patron of the Children's Liver Disease Foundation since 2010.
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In an exclusive interview with ITV News, 100 metre world champion Justin Gatlin also said that booing at the World Championships "did hurt".
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