Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Marko Ili (born 9 May 1985 in Belgrade, SR Serbia, SFR Yugoslavia) is a Serbian footballer who plays as a midfielder for Bulgarian club Sliven 2000. A midfielder (or simply mid) is an association football position. Some midfielders play a more defensive role, while others blur the boundaries between midfielders and forwards. The number of midfielders a team uses during a match may vary, depending on the team's formation and each individual player's role. The group of midfielders in a team is called the midfield.