Reference: Fataawa ash-Shaykh Ibn Humayd – Page 276, Question No.290
Question: Is it permissible for a person, who performs/carrys out his obligations at their respective times, to watch and play football in his spare time?
Response: There is no harm in this, so long as the football does not distract you from any of your obligations, and that you cover your ‘awrah, and that no prayers are missed with the Muslims [in congregation] in the masaajid, and that it is not a cause for you to leave any of your obligations. So I hope there is no problem [with this], in shaa.-Allaah. And Allaah [alone] has the Complete knowledge [of all affairs].