Question: Are both Jean-Julien Rojer and Kathy Jordan American?

Context articles: 2009 Serbia Open – Doubles
Kathy Jordan
2013 Gerry Weber Open – Doubles
Jean-Julien Rojer
2014 Sony Open Tennis – Men's Doubles
2010 Farmers Classic – Doubles
Horia Tecău
2014 Stockholm Open – Doubles
2010 Nord LB Open – Doubles
2016 ABN AMRO World Tennis Tournament – Doubles

Łukasz Kubot and Oliver Marach won the final 6–2, 7–6(3) in the final against Johan Brunström and Jean-Julien Rojer.
Kathryn "Kathy" Jordan (born December 3, 1959) is a former American tennis player.
 During her career, she won seven Grand Slam titles, five of them in women's doubles and two in mixed doubles.
 She also was the 1983 Australian Open women's singles runner-up and won three singles titles and 42 doubles titles.
Aisam-ul-Haq Qureshi and Jean-Julien Rojer were the defending champions, but lost in the first round to Kei Nishikori and Milos Raonic.
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Jean-Julien Rojer (] ; born 25 August 1981) is a Dutch professional tennis player from Curaçao.
 His highest ATP singles ranking is 218th, which he achieved on 15 August 2005.
 A doubles specialist, his career-high in doubles is World No. 3, which he reached in November 2015.
 His former doubles partners include Eric Butorac and Aisam-ul-Haq Qureshi.
 He currently plays with Horia Tecău of Romania, with whom he won the men's double titles in the 2015 Wimbledon and 2017 US Open championships.
 With Anna-Lena Grönefeld, he also won the mixed doubles' title at the 2014 French Open.
 He attended UCLA where he competed for the UCLA Bruins men's tennis team.
Aisam-ul-Haq Qureshi and Jean-Julien Rojer were the defending champions, but chose not to participate together.
 Qureshi played alongside Rohan Bopanna, but lost in the second round to Juan Sebastián Cabal and Robert Farah.
 Rojer teamed up with Horia Tecău, but lost in the first round to Julien Benneteau and Édouard Roger-Vasselin.
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Bob and Mike Bryan successfully defended their title, defeating Eric Butorac and Jean-Julien Rojer in the finals 6–7, 6–2, [10–7].
 The twin brothers set a record of 62 career doubles titles on the ATP Tour, surpassing The Woodies (Todd Woodbridge and Mark Woodforde).
 Rojer, who was a UCLA tennis player (1999-2002), returned to play on his college home court.
Horia Tecău (] ; born January 19, 1985) is a Romanian tennis player currently ranked World No. 9 in doubles.
 He turned pro in 2003 and reached the men's doubles finals of the 2010, 2011 and 2012 Wimbledon Championships with Robert Lindstedt before winning it in 2015 with Jean-Julien Rojer, with whom he also won the 2017 US Open.
 Tecău also won the 2012 Australian Open mixed doubles title with Bethanie Mattek-Sands and the 2015 ATP World Tour Finals with Rojer.
Aisam-ul-Haq Qureshi and Jean-Julien Rojer were the defending champions, but Qureshi chose not to participate this year.
 Rojer played alongside Horia Tecău, but lost in the first round to Grigor Dimitrov and Pierre-Hugues Herbert.
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Johan Brunström and Jean-Julien Rojer were the defending champions, but Rojer chose not to compete this year.Brunstrom partnered up with Mischa Zverev, but they lost in the first round against Pablo Santos and Ivan Sergeyev.
 <br>Leonardo Tavares and Simone Vagnozzi won the final against Igor Kunitsyn and Yuri Schukin 7–5, 7–6(4).
Jean-Julien Rojer and Horia Tecău were the defending champions, but lost in the semifinals to Philipp Petzschner and Alexander Peya.
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