Nope. Good assumption, but I literally cannot believe that Champions League final round results affect us.I assume your point is "we'll win on Thursday, so all third place CL teams will be irrelevant to us".
If so, I say: not really - I'm interested to know what teams are dropping into the Europa League and who we may be facing in the round-of-16.
From what I can see looking at last year's tournament, the group winners do not face each other initially, with each one drawn against a winner of the intermediate knockout stage. So, in short, there could be a CL third place side in our near future one way or another!
Wake us up when the dream's over, boss.