#4 Diego Simeone
A dogged midfielder as a player, Simeone has taken his never say die attitude into his managerial career and has proven himself among the world's very best during his seven-year spell in charge of Atletico Madrid.
Simeone was a brilliant player - enjoying success at Atletico Madrid, Inter Milan and Lazio as well as excelling on the international stage with Argentina.
Following retirement he moved into coaching in his home country, winning titles with Estudiantes de La Plata and River Plate before returning to Atletico in December 2011.
Up against the financial might of city neighbours Real Madrid, and Barcelona, Simeone has turned Los Rojiblancos into one of the most successful teams in the world through astute recruitment and inspiring leadership.
During his time at the club he has won a league title, a Spanish Cup, a Spanish Super Cup, two Europa League crowns and two UEFA Super Cups. They have also come agonisingly close to winning two Champions League titles, missing out on both occasions to Real Madrid.