Not sure how easy such tactics are in netball; I wouldn't watch the game for the tactics, which also explains my ignorance of tactics in beach volleyball.
Chelsea? Dunno. Ask Mourinho. He wins enough. Every manager has to deal with what he's got. Chelsea haven't got great players in every position and didn't have when he was manager. His ideal was a one-nil draw. Well, the nil part was. In the UEFA final, what benefit to Chelsea was there in keeping it nil-nil ? Bank everything on a penalty shoot-out ? Against a German team?
In football, good defending is not as appreciated, in general, as good attacking, but the logic that says 'You start the game with a draw' is still true, even though the points system gives 3 for a win, and no team will win much if its defence isn't top notch. Nothing new in defending well and scoring with sporadic attacks or one counter attack ; in boxing Archie Moore was a master at it, but probably not as a big a draw or as crowd pleasing as the whirlwind type.