Question: What sport does Rohan Bopanna and Cara Black have in common?

Context paragraphs:
2012 If Stockholm Open – Doubles: Rohan Bopanna and Aisam-ul-Haq Qureshi were the defending champions but Bopanna decided not to participate. <br>

2009 LA Tennis Open – Doubles: Rohan Bopanna and Eric Butorac were the defending champions, but Bopanna did not participate that year. <BR>Butorac partnered with Scott Lipsky, but lost in the first round to Denis Istomin and Leonardo Mayer. <BR>Bob Bryan and Mike Bryan won in the final 6–4, 7–6 against Benjamin Becker and Frank Moser.

2012 Gerry Weber Open – Doubles: Rohan Bopanna and Aisam-ul-Haq Qureshi were the defending champions but Bopanna decided not to participate. <br>

2013 BNP Paribas Masters – Doubles: Mahesh Bhupathi and Rohan Bopanna were the defending champions, but Bhupathi decided not to participate.  Bopanna played alongside Édouard Roger-Vasselin.

2016 MercedesCup – Doubles: Rohan Bopanna and Florin Mergea were the defending champions, but Bopanna chose to compete in s'Hertogenbosch instead.  Mergea played alongside Horia Tecău, but lost in the semifinals to Marcus Daniell and Artem Sitak.

Rohan Bopanna: Rohan Bopanna (born 4 March 1980) is an Indian professional tennis player.  His singles career high ranking was World No. 213 in 2007 and his career high ranking in doubles was World No. 3 on 22 July 2013.  Recently, most of his appearances in professional tournaments have been in doubles matches.  He is a member of the Indian Davis Cup team since 2002.  In 2010, he finished as a runner-up in doubles at the US Open, partnering with Aisam-ul-Haq Qureshi.  He won the 2017 French Open - Mixed Doubles title with Gabriela Dabrowski of Canada becoming the fourth Indian player to win a Grand Slam title.

Cara Black: Cara Black (born 17 February 1979) is a professional tennis player from Zimbabwe.  She is primarily a doubles specialist, winning 60 WTA and 11 ITF titles in that discipline.  A former no. 1 ranked women's doubles player in the WTA Rankings, she has won ten Grand Slam titles in women's doubles and mixed doubles combined.  By winning the mixed doubles title at the 2010 Australian Open, Black became the third woman in the Open Era to complete a Career Grand Slam in mixed doubles (after Martina Navratilova and Daniela Hantuchová).  Having won one singles title on tour, she also peaked at no. 31 in the singles rankings in March 1999.

2014 Open 13 – Doubles: Rohan Bopanna and Colin Fleming were the defending champions, but Bopanna chose not to participate.  Fleming played alongside Ross Hutchins, but lost in the quarterfinals to Marin Draganja and Mate Pavić. <br>

2012 Western &amp; Southern Open – Men's Doubles: Mahesh Bhupathi and Leander Paes were the defending champions.  However, they chose not to play together.  Bhupathi played with Rohan Bopanna and Paes played with Radek Štěpánek

2016 Dubai Tennis Championships – Men's Doubles: Rohan Bopanna and Daniel Nestor were the defending champions, but chose not to compete together.  Bopanna played alongside Florin Mergea, but lost in the first round to Nestor and Radek Štepánek.  Nestor and Štepánek lost in the quarterfinals to Łukasz Kubot and Marcin Matkowski. <br>

Supporting paragraphs: Rohan Bopanna Cara Black
Answer: tennis