Well looking at the counter formations thread 4-4-2 seems to counter 4-1-3-2 so I'd probably be tempted to go with that although I don't usually have much luck in the cup or champions league so that's just my opinion. If he's got good free kick takers then avoid hard tackling.

What formation do you usually play? I try to avoid changing my formation too much so I'd also be tempted to keep faith with my current tactics!