There are moments in life when you know the world has shifted from its axis.Like on Tuesday night, in the middle of a World Cup qualifier, when the Tartan Army struck up a chant.For a tennis player.The subconscious acknowledgement of a shift in our national pride from what they were watching in front of them, and despairing at, to a sport which has long been the pursuit of the middle classes but suddenly has its everyman.A class reaction for a truly world class act, and recognition for the best moment in the history of Scottish sport.