In The Name of Allaah, The Most Merciful, The Bestower of Mercy.
Shaikh Uthaymeen [rahimahullaah] stated about the football:
There is no harm in playing football if the following conditions are fulfilled: 1: Clothing worn should cover what is haraam [i.e. awrah] for another person to see. 2: Should not lead to neglecting an obligation. 3: No foul language. 4: Should not be a habit, such as the one who plays every afternoon. As for playing sometimes, there is no harm in doing so for recreation. And there is no doubt that football invigorates the body and strengthens it. [Source: Sharh Hilyati Taalibil Ilm’ pages 46-47]