GettyRichard MillsLamine Yamal drops bombshell as Barcelona wonderkid becomes latest superstar 'signing' for Gerard Pique's Kings LeagueL. YamalBarcelonaLaLigaBarcelona star Lamine Yamal has become the latest superstar 'signing' for Gerard Pique's Kings League tournament.Article continues belowArticle continues belowArticle continues belowArticle continues belowPique launches Kings League tournamentSeven-a-side event grows in popularityBarca's Yamal league's latest 'signing'