rival (indeed against all other participants) through financial means.
where the parent club can stop the player from playing against them. That's why the clause is there. If the rules were the same as the domestic ones there'd be no issue.
Do you whinge about this **** when one of our loaned out players in years gone by were not allowed to play against us?
the world. Believe me, if they are drawn together and Courtois can't play there will be a major hoohah and the rules will change.