As a goalkeeper, indecision can be disastrous. The slightest hesitation between two options can be the difference between getting to the ball or claiming the cross, and letting the striker nick the ball ahead of you, or seeing the cross sail tantalisingly over your fingertips.

It is a position that trains you to be certain, even when you are not. So when Kepa Arrizabalaga faced down Samuel Umtiti in a semi-final shoot-out at the 2012 under-19 European championship, he knew which way he was going. When Chelsea came in with a £71.6 million offer to prise him from his boyhood club, Athletic Bilbao, he knew which way he was going. And when Maurizio Sarri, the Chelsea head coach, stood on the Wembley touchline in the