Question: What football position did the person formerly play who nicknamed Srđan Mijailović "Mićko"?

Context paragraphs:
Public Bank F.C.: Public Bank Football Club or Public Bank FC is a now defunct football club from Malaysia, based in Selayang, Selangor.  The club home ground is the Majlis Perbandaran Selayang Stadium.  The club formerly play in Malaysia Super League before pulled from the league after the end of 2005 season.

Midfielder: A midfielder is an association football position.  Midfielders are generally positioned on the field between their team's defenders and forwards.  Some midfielders play a disciplined defensive role, breaking up attacks, and are otherwise known as defensive midfielders.  Others blur the boundaries, being more mobile and efficient in passing: they are commonly referred to as deep-lying midfielders, play-makers, box-to-box, or holding midfielders.  The number of midfielders on a team and their assigned roles depends on the team's formation; the collective group of these players on the field is sometimes referred to as the midfield.

Second five-eighths: Second five-eighths, or sometimes second five-eighth, is a name used in New Zealand to refer the rugby union football position commonly known elsewhere as the inside centre or number 12.

Thomas Goolnik: Thomas Goolnik is a person formerly associated with the company TLD Networks.  He has achieved notoriety in a battle over the European "Right To Be Forgotten," in particular whether current articles written about the RTBF are also subject to RTBF.

Srđan Mijailović: Srđan Mijailović (Serbian Cyrillic: Срђан Мијаиловић; born 10 November 1993) is a Serbian football player who plays for FC Krylia Sovetov Samara.  Head coach Robert Prosinečki affectionately referred to him as "Mićko".

Running back: A running back (RB) is an American and Canadian football position, a member of the offensive backfield.  The primary roles of a running back are to receive handoffs from the quarterback for a rushing play, to catch passes from out of the backfield, and to block.  There are usually one or two running backs on the field for a given play, depending on the offensive formation.  A running back may be a halfback (in certain contexts also referred to as a tailback) or a fullback.  A running back will sometimes be called a "feature back" if he is the team's starting running back.

Cal Hubbard: Robert Calvin Hubbard (October 31, 1900 – October 17, 1977) was a professional American football player and Major League Baseball (MLB) umpire.  After playing football at Centenary College and Geneva College, Hubbard played in the National Football League (NFL) between 1927 and 1936 for the New York Giants, Green Bay Packers and Pittsburgh Pirates, playing the bulk of his career with the Packers.  Hubbard is credited as being one of the inventors of the football position of linebacker.

Marko Mijailović: Marko Mijailović (; born 14 August 1997) is a Serbian football defender who plays for Rad.  He is younger brother of Srđan Mijailović.

Robert Prosinečki: Robert Prosinečki (] ; born 12 January 1969) is a Croatian football manager and former football midfielder.  He is one of the few footballers to have played for both the Spanish rival clubs Real Madrid and FC Barcelona.

Souleymane Konaté: Souleymane Konaté (born 20 September 1989) is a Malian professional footballer who plays as a defender for Malaysian club PDRM FA.  He formerly play for Stade Malien.

Supporting paragraphs: Srđan Mijailović Robert Prosinečki
Answer: midfielder