Ah, the number six. To some, a domineering centre half, but to many, a central midfielder with the quiet ability to dictate the tempo of his team.
Like a conductor instructing his orchestra, a good number six can take control, sometimes without fans even realising.
You can read RealSport’s best number sevens feature HERE.
The best teams in the world all have one, and only now are they starting to get the recognition they deserve.
Here are the five that are going to have a big impact in Russia.