NEW YORK, NY, USA – Even before Martina Hingis and Sania Mirza’s headline-grabbing split, the doubles draw at this year’s US Open promised to be the most open in recent memory.

The surprise and sudden parting of Hingis and Mirza elevated rivals Caroline Garcia and Kristina Mladenovic to top seeds, although arguably not favorites. Fast forward a few weeks and hierarchy is no clearer on the eve of the opening round at Flushing Meadows.

Garcia and Mladenovic, who will start on Thursday, were handed what on paper appeared to be a relatively straightforward opening assignment against Kurumi Nara and Naomi Osaka – a rookie partnership not famed for their success in doubles. Nevertheless, with the French duo badly out of form – they have mustered together a total of just four wins since lifting the Roland Garros crown at the start of the summer – nothing is a formality.

Beyond that, the draw has been relatively kind; indeed, should they recover the joie de vivre that carried them through an all-conquering clay court season, a place in the last eight beckons.

There they are seeded to meet Mirza and her new partner, Barbora Strycova. In their first tournament, the two hit the ground running, collecting a title that would also give Mirza sole ownership of the No.1 ranking.

Hopes of more success were boosted by Strycova’s early singles exit, leaving the No.7 seeds’ opening week schedule clear to focus on avoiding a similar fate at their first major in unison.

Hingis is also in the top half, and also competing alongside a player smarting from a surprise loss flying solo: CoCo Vandeweghe. However, the draw has been less generous, placing them in a section containing several regular pairings, starting with Anna-Lena Groenefeld and Kveta Peschke.

Should they come through the early rounds unscathed, a potential quarterfinal showdown with 2013 winners and recent Olympic silver medalists Andrea Hlavackova and Lucie Hradecka awaits.

The title favorites are arguably to be found in a bottom half of the draw containing No.2 seeds Chan Hao-Ching and Chan Yung-Jan, Wimbledon finalists Timea Babos and Yaroslava Shvedova, and former champions Ekaterina Makarova and Elena Vesnina.

Seeded No.5 this time, Makarova and Vesnina find themselves in a relatively unthreatening section, the stiffest competition likely to come from Vania King and Monica Niculescu. The Chan sisters, who fell in the quarterfinals 12 months ago, appear equally well-placed to reach the second week.

Since coming so close to tasting Wimbledon glory, Babos and Shvedova have made a couple of solid if unspectacular showings on the North American hardcourt circuit, leaving them relatively fresh for New York. They will begin with a potentially tricky assignment against crowd favorite CiCi Bellis and Julia Boserup.

Also in their section are a number of experience pairings, including Kiki Bertens and Johanna Larsson, No.8 seeds Julia Goerges and Karolina Pliskova, and two-time major winners Bethanie Mattek-Sands and Lucie Safarova.