In the semi-final of the Cup the opposition player is in league 30, when I'm in league 27.
The other two teams in the other semi are both in league 27 too.
Unsurprisingly the team I'm against has absolutely thrashed every opponent so far, by between 5 and 12 goals over each two legs.
I don't think I've EVER drawn an opponent in a lower league than mine in the cup, but at least it's usually been fair as their ability is usually the same as mine. This team is more than 20% above mine, it's hardly worth bothering.