We've waited longer than usual (in more ways than one), but the Australian Open preview is here. Gill Gross breaks down the draw quarter-by-quarter: quarterfinal predictions, dark horses, upset alerts and popcorn matchups. Top-seeded Novak Djokovic seeks his 9th Australian Open title, in a quarter with Alexander Zverev, occasional kryptonite Stan Wawrinka, and big-serving Milos Raonic. Dominic Thiem looks to back up last year's run at the final with another strong showing, as Pablo Carreno Busta and Diego Schwartzman loom in his quarter. Russians Daniil Medvedev (4) and Andrey Rublev (7) come off an ATP Cup victory, and are now paired in the same quarter in the bottom half of the draw. Finally, Rafael Nadal seeks major #21, hoping his back holds up against the likes of Stefanos Tsitsipas and Matteo Berrettini in his quarter.