Kansas Jayhawks’ Silvio de Sousa  celebrates cutting down the net after defeating the Duke Blue Devils  in the 2018 NCAA Men’s Basketball Tournament Midwest Regional at  in Omaha, Nebraska. Photograph: Jamie Squire/Getty Images

Silvio de Sousa arrived in America from Angola in January 2015. He stood 6ft 9in, had just turned 16 years old, and didn’t speak a word of English. He(...)