Tímea Babos and Hsieh Su-wei were the defending champions, but Babos decided not to participate.
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Hsieh Su-wei and Peng Shuai were the defending champions, but lost in the third round to Tímea Babos and Kristina Mladenovic.
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Tímea Babos and Chan Hao-ching were the defending champions, but Chan chose not to participate this year.
 Babos chose to play in Monterrey, but lost in the first round.
Tímea Babos and Kristina Mladenovic were the defending champions, but chose not to compete together.
 Babos played alongside Julia Görges, but lost in the semifinals to Caroline Garcia and Mladenovic.
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Martina Hingis and Sania Mirza were the defending champions, but chose not to participate together this year.
 Hingis played alongside Coco Vandeweghe, but lost in the quarterfinals to Tímea Babos and Anastasia Pavlyuchenkova.
 Mirza teamed up with Barbora Strýcová, but lost in the final to Babos and Pavlyuchenkova, 4–6, 4–6.
Tímea Babos and Sloane Stephens were the defending champions, but did not participate that year.
Tímea Babos and Lucie Šafářová were the defending champions, but chose not to participate together.
 Babos played alongside Kristina Mladenovic, but lost in the semifinals to Raquel Kops-Jones and Abigail Spears.
 Šafářová teamed up with Belinda Bencic, but lost in the first round to Kimiko Date-Krumm and Karolína Plíšková.
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Tímea Babos (] ; born 10 May 1993) is a Hungarian tennis player.
Pierre-Hugues Herbert (] ; born 18 March 1991) is a French professional tennis player.
 In doubles, he won the title at the 2015 US Open and 2016 Wimbledon as well as several Masters 1000 tournaments along with Nicolas Mahut.
 In singles he has reached one ATP career final (at the 2015 Winston-Salem Open), and achieved his career high singles ranking of World No. 64 on 14 August 2017.
Tímea Babos and Kimiko Date-Krumm were the defending champions, but chose not to participate together.
 Babos played alongside Olga Govortsova, while Date-Krumm teamed up with Karolína Plíšková.
 The two teams were scheduled to meet in the semifinals, but Date-Krumm withdrew with a right leg injury.
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Question: Tímea Babos and Pierre-Hugues Herbert, both play which sport?
Answer: tennis