Martina Hingis and Chan Yung-Jan have dominated the 2017 season. The duo, who only just paired up in February, won nine crowns together, including the their first Grand Slam at the US Open. It marked Chan's first career major and Hingis' 25th.

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Hingis and Chan also picked up hardware in Indian Wells, Madrid, Rome, Mallorca, Eastbourne, Cincinnati, Wuhan and Beijing.

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Hingis and Chan have reached the quarterfinals or better of every tournament they've played together.

With all the wins, Hingis became No. 1 in the doubles rankings on October, 20 years after first reaching that peak as a teenager. Chan is ranked No. 2.

The duo are strong favorites at the WTA Finals in Singapore, which starts with singles on Sunday.