Third quarter: Underdogs reign, could upset Big 4
Headlined by fourth seed Kei Nishikori, the third quarter features a number of players who have all showed immense potential against the Big 4, but not been entirely successful. Sam Querrey, fresh off his title win over Rafael Nadal at the ATP500 Abierto Mexicano Telcel is in this quarter, as is Nadal vanquisher Lucas Pouille.
Marin Cilic is also in this quarter, with Delray Beach Open Jack Sock, as the 17th seed, receiving a first-round bye in Q3.
Cilic could play either teen sensation Taylor Fritz or experienced campaigner Benoit Paire in his first match, while Nishikori, who has rarely, if ever, been patchy in terms of fitness, up against one of two players who have of late exhibited that trait – Dan Evans of Great Britain, or the mercurial Dustin Brown, who spent most of his 2016 season on the Challenger tour.
This appears to be an easy one for Nishikori until the quarter-finals, but that is when things will start to perhaps get tricky.