To become really good at anything requires years of effort and dedication. To become a world champion in any type of sport requires you to make it a part of your life. But what happens when, after you have put in the years of training, practise and hard work, someone else comes along – who’s put in half the effort you have – and beats you anyway? And what does it feel like when – just to make things worse – the opponent who defeats you is not a fellow homo sapiens but a computer; which probably didn’t even exist when you started learning the game? Let’s take a look at three world champions who have had this terrible experience and how they have reacted and coped (or not) afterwards.