My take on this Perth trip thingy is its all a load of hogwash,
Not denying that teams get beat when coming back from Perth, but the reason they do is not physical but all in they're head....
If your told all week your gunna be tired come matchday, if the coaching staff change all your training drills insinuating that your not gunna have your spring in your step......................well guess what I reckon the players believe it & come out & play like that.
I know its not as physical nor as exhausting, but European soccer players fly all round the place playing matches during the week, & front up for there weekend league match no probs at all.
that my theory on things anyhow.....