Mop-haired and dressed in jeans and a black-and-white striped sweater, 16-year-old Martin Odegaard looked like a student walking the streets of Madrid. But this was no ordinary teenager.

Arsenal star Martin Odegaard has backed teammate Kai Havertz to kick on after leading the Gunners attack in their 5-1 Premier League hammering of Manchester City. The hosts produced an incredible ...