Emiliano Martinez is one of the top goalkeepers in the world, and he and Argentina are reigning World Cup champions.In this 2026 edition of the FIFA World Cup, Martinez has gone with a cool addition to his look -- he's got colors painted on the side of his head.Whenever Martinez comes into the frame, it's hard to miss. The left side of his skull isn't just his hair -- it's colorful.And yeah, you've probably already figured out what it is.MORE: Christian Pulisic gives a terrible answer after World Cup-ending lossWhat's on Emi Martinez's head?Many have likely already realized what this is: It's Argentina's flag.Martinez has the light blue and white stripes of his nation's flag painted onto his head.You can see the visual in the photograph at the top of this article.MORE: Folarin Balogun, aft