In this week’s Sport: Ayrton Senna – to mark the 20th anniversary of the legendary racing driver’s untimely death, we speak to those who knew him well | Life after sport: we investigate why, for many sportspeople, retirement from stardom can be so tough to cope with | Cult classics: our guide to the World Cup teams really worth remembering | World Cup Stories: how one special Italian went from zero to hero in 1982