Did I do the splits? No. Of course, the flexibility of the hip joint is important. But I just pulled the top of my red socks to make the soccer socks over the knee. The long sleeves soccer shirts and shorts are both Liverpool FC. And I like the classic taste of Adidas Copa Mundial.
By the way, I make it a rule to practice soccer ball juggling using both legs. As I am a right handed person, juggling a ball with my left foot is harder than with my right foot. When I use my weak foot, the flexibility of my hip joint is important. So I often do core training and stretching which makes my hip joint more flexible.