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 were without captain Martin Odegaard for their 1-0 win at Wolves, as their captain had to pull out of the squad on the morning of the game. Mikel Arteta has had so many injury problems to ...