It was an afternoon of celebration, a day when an icon's legacy was published, but Pep Guardiola felt the need to apologise.
Perched on a stool in the basement of Waterstone's on Tottenham Court Road, Guardiola was speaking emotionally about Johan Cruyff when he turned to his left and looked to his late mentor's son, Jordi, was sitting.
'Oh I was scared!' said Guardiola, when asked how it felt to be an 18-year-old standing on the same pitch as Cruyff. 'He was so tough, so demanding. Jordi… I'm sorry! That was when he was a coach. In training he was better than all of us.