清道夫即sweeper,自由人为libero。这是两个定义可供参考:
其一,足球领域中,自由人又被称作清道夫,指的是位置在其他后卫身后的防守球员。自由人是球队的最后一道防线,并经常成为进攻的发起者。这个位置诞生在意大利,但现代足球中自由人这一角色主要是由德国的贝肯鲍尔定义的。
其二,Sweeper ,A fast & tough player who usually plays just behind the fullbacks......Libero,The Italian term for "free player". Usually refers to the "Sweeper", but also can refer to a star player who is allowed to roam and play in the rear or front as he sees fit.