Player unions have legally challenged the world governing body of football, FIFA, over a new, larger version of the Club World Cup that’s taking place in the US next year. FIFA has increased the number of teams in the competition from seven to 32, prompting concerns from player associations which fear mental and physical breakdowns amid an already overcrowded calendar. The claim has been filed with the Brussels Court of Commerce and will be likely passed on to the European Court of Justice. “Players and their unions have consistently highlighted the current football calendar as overloaded and …