You're making a very risky prediction man, you should know how consistant psg is lately more especially in the champions league so betting on arsenal to beat them straight up without adding a double chance at least seems to be very risky, for the fact that arsenal got real madrid eliminated in the champions league does not give a guarantee that they will also repeat the same to psg. Perhaps I think real madrid was so lucky that they even get to that stage, of course you and I know how difficult it was for them during the champions league both in thier domestic league as well. But psg have not been facing this difficulties that's to prove to you that the performance of psg this season is way more better than that of real madrid, though I can't possibly predict the outcome I think the end will justify.