LONDON (Reuters) - An Australian Open that began in a heatwave and contained seismic shocks aplenty ended with Stanislas Wawrinka defeating Rafa Nadal to further undermine the superiority of the so-called big four in men's tennis.
In reaching the final after missing last year's tournament Nadal has cemented his world No. 1 ranking and will be hard to shift from the summit but below him the landscape is changing.
