I'm sure Palace will approach it as a friendly too, they don't want injuries ahead of their European cup final either, and their spot in the league isn't in danger. You probably don't want to risk someone like Saka or Saliba. OTOH, they have rhythm now and after playing twice a week for 9 months or so, 2 weeks off might not be ideal.

But, it's a great chance to give players who might be needed in the final some playing time.