By Jude Summerfield Lamine Yamal revealed his Barcelona team believe they are the best in the world after beating Real Madrid in El Clasico on Saturday night. The teenage superstar was one of the Blaugrana’s scorers at the Bernabeu as they took a six-point lead in the La Liga title race after 11 games. Robert Lewandowski had scored a quick brace at the start of the second half before Yamal fired in at the near post – becoming the youngest goalscorer in El Clasico history \- with Raphinha then making it 4-0 with another strike in the 84th minute. It came just days after Barca had thumped Bayern…