Which sanction could a single judge impose on a player?

The imposition of a suspension by a single judge is consistent with the severity of disciplinary actions that can be taken against a player under the FIFA framework. A suspension of 4 matches signifies a significant penalty that addresses serious misconduct and serves as a deterrent against future infractions. The disciplinary code allows for such sanctions to promote fair play and maintain the integrity of the sport.

In contrast, while warnings do exist, they generally are used for less severe infractions and not as a formal sanction by a single judge. Community service roles are not typically included in the FIFA sanctioning framework, as the focus is on competitive integrity rather than social obligations. Monetary compensation to the club also falls outside of standard sanctions aimed at individual players and is typically not within the remit of a single judge. Therefore, the suspension option aligns with FIFA's disciplinary measures aimed at addressing and rectifying player behavior effectively.