Oh, and attackers don't need
great strength in the slightest. As people have already stated, are players like Owen, Wright-Phillips or even Ronaldinho particularly strong? Not in my opinion (though I coulldn't be certain with our Brazilian friend).
They don't use strength to beat defenders, but use control, pace, quick feet and determination. Oh, and Ronaldinho uses the odd elastico, of course!
As I say, strength is an important part of your game, but if you are quick enough, skillful enough, and aware enough (as in playing cleverly off the ball, and knowing when player is near you) then you will hardly ever have to use it. You WILL have to use it at some point... but it's hardly vital.
Rooney is damn strong, but he's got a bit of pace and pretty quick feet too. Oh, and one helluva' strike!
P.S - Serbia are a good team... I never said they weren't.