Fifty years ago, Martina Navratilova left everything she knew in communist Czechoslovakia to start a new life in the US.
Then an 18-year-old high school pupil, she was one of the Cold War's most high-profile defectors - and she would go on to become one of tennis's most iconic players.
But speaking to the BBC's Amol Rajan, she says that she fears the US now "wouldn't let me in".
"I'm not loyal to [US President] Donald Trump," she says, adding that she worries the US has become a "totalitarian" state.
Since President Trump took office in January, his administration has carried out sweeping immigration raids, sparking protests in parts of the country. He has also instituted a travel ban for citizens from 12 countries, and there have been reports of tourists being detained at the border.
