Why football's sweeper was called libero, the free man
Italians called the sweeper libero, short for a phrase meaning free from man-marking duties. Stationed behind the defensive line, this spare defender mopped up anything that slipped past teammates and often launched counter-attacks. Once central to catenaccio, the role has almost vanished, surviving mainly in ball-playing centre-backs and sweeper-keepers.
Defenders come in four main types: centre-backs, full-backs, sweepers and wing-backs. Centre-backs, often tall so they can win aerial duels, block shots, tackle, intercept and shadow centre-forwards, and most formations such as 4-4-2 and 4-3-3 use two of them. Successful pairings often combine a physical defender with a quicker, more composed passer, as Carles Puyol and Gerard Pique did for Barcelona and Spain. At corners they push forward to use their heading ability while teammates cover behind.
The sweeper's roots trace to the Austrian Karl Rappan, who in the 1930s at Servette pulled a midfielder back behind the defence as a last man in his verrou, or doorbolt, system. In the Soviet Union during the 1940s Aleksandr Abramov used something similar called the Volga clip. At Salernitana, Giuseppe Viani reworked the WM on a suggestion from his player Antonio Valese; the tweak was meant to help smaller clubs, since strict man-marking pitted players one against one and favoured richer teams with better individuals.
Nereo Rocco and Helenio Herrera popularised the libero through catenaccio, and the journalist Gianni Brera is thought to have coined the word; Italian liberos usually wore number six. Early versions simply patrolled the back line, with Ivano Blason often called the first true Italian libero and Armando Picchi anchoring Herrera's Grande Inter. Franz Beckenbauer is widely credited with the modern form, which carries the ball forward and starts attacks, and Giorgio Mastropasqua brought that style to Italy in the 1970s.
Zonal marking and the offside trap have made the role largely obsolete, though Otto Rehhagel used Traianos Dellas as a sweeper when Greece won Euro 2004. Today its spirit lives on in ball-playing centre-backs such as John Stones and Leonardo Bonucci in three-man defences, and in goalkeepers like Manuel Neuer who rush off their line to clear through balls.
Source: Defender (association football)