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.
Nicolas Mahut and Vasek Pospisil were the defending champions, but Pospisil chose not to participate this year.
 Mahut played alongside Pierre-Hugues Herbert, but lost in the semifinals to Ivan Dodig and Marcel Granollers.
Pierre-Hugues Herbert and Nicolas Mahut were the defending champions, but withdrew before their second round match due to Herbert's leg injury.
Venus Ebony Starr Williams (born June 17, 1980) is an American professional tennis player who is currently ranked world No. 5 in the WTA singles rankings.
 She is generally regarded as one of the all-time greats of women's tennis and, along with younger sister Serena Williams, is credited with ushering in a new era of power and athleticism on the women's professional tennis tour.
Pierre-Hugues Herbert was the defending champion but withdrew before the tournament began.
Pierre-Hugues Herbert and Édouard Roger-Vasselin were the defending champions but Roger-Vasselin decided not to participate.
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Pierre-Hugues Herbert and Albano Olivetti were the defending champions but only Olivetti chose to defend his title, partnering Kevin Krawietz.
 Olivetti lost in the first round to Roman Jebavý and Igor Zelenay.
Vasek Pospisil and Jack Sock were the defending champions, but lost in the final to Pierre-Hugues Herbert and Nicolas Mahut, 3–6, 6–7.
Bob and Mike Bryan were the two-time defending champions, but lost in the semifinals to Pierre-Hugues Herbert and Nicolas Mahut.
Pierre-Hugues Herbert and Nicolas Mahut were the defending champions, but lost in the second round to Novak Djokovic and Viktor Troicki.

Question: What sport does Pierre-Hugues Herbert and Venus Williams play?
Answer: tennis