By Katie Catherall Barcelona manager Hansi Flick has revealed the strict rule he has for his squad in order to maintain discipline. The Catalan giants have enjoyed an immense start to the 2024/25 campaign, sitting atop the La Liga table six points clear of fierce rivals Real Madrid ahead of their clash with Real Sociedad on Sunday evening. Flick’s reign so far has been considerably more successful than the end of Xavi’s tenure last season, putting the side in serious contention for the league title. But with great power comes great responsibility, something Flick has adapted to already since h…