Lamine Yamal is just 19 years old, but he's already considered one of the best football players in the world. He's also a big brother. The Spanish footballer is taking the field at the World Cup with the support of his little brother. Keyne is a 3-year-old social media star who appears in Lamine's TikTok videos and cheers him on at the World Cup. Do you have a sibling who supports you? Maybe they cheer you on at sports games or help you with your homework. Tell us in the comments!