We never need to be "forced" to play an open game, but SAF has shown Spurs respect in recent times by picking a side best able to thwart the threats Spurs pose. Rafael has done a surprisingly good job on Bale, Modric has been closed down and marginalised and I don't recall vdV being much of a threat.
I expect more of the same on Sunday, although I think we can trouble your full backs, in particular. Winning is what matters at this stage; it's not an exhibition game.