David Ji
David Longfen Ji is an American businessman who co-founded Apex Digital, an electronics manufacturer.
In 2004, he was arrested in China following a dispute with Sichuan Changhong Electric, a supplier owned by the city of Mianyang and the province of Sichuan.
Changhong accused him of defrauding them through bad checks.
Ji was taken, according to an account by his lawyer, to the senior management and told, "I decide whether you live or die."
He has been held in China without charges.
Ji's case highlighted an "implicit racism" in dealings with American businessmen.
As a U.S. citizen he was not granted the same treatment by authorities as non-ethnically Chinese businessmen sharing the same nationality.
2002 BMW Open – Doubles
Petr Luxa and Radek Štěpánek were the defending champions and won in the final 6 – 0, 6 – 7,[ 11 –9] against Petr Pála and Pavel Vízner.
2006 Open 13 – Doubles
Martin Damm and Radek Štěpánek were the defending champions and successfully defended their title, winning in the final 6 – 2, 6 – 7,[ 10 –3], against Mark Knowles and Daniel Nestor.
Aleksandr Syomin
Aleksandr Vasilyevich Syomin (9 August 1943 – 14 October 2016) was a Soviet football player.
2013 US Open – Men's Doubles
Bob Bryan and Mike Bryan were the defending champions, but lost in the semifinals to Leander Paes and Radek Štěpánek.
The loss ended the Bryan brothers' bid to win a calendar grand slam.
Leander Paes and Radek Štěpánek won the title, defeating Alexander Peya and Bruno Soares in the final, 6 – 1, 6–3.
2007 Next Generation Adelaide International – Doubles
Wesley Moodie and Todd Perry won the title, defeating Novak Djokovic and Radek Štěpánek 6 – 4, 3 – 6,[ 15–13] in the final.
2004 Grand Prix de Tennis de Lyon – Doubles
Jonathan Erlich and Andy Ram were the defending champions and successfully defended their title, defeating Jonas Björkman and Radek Štěpánek 7 – 6, 6 – 2 in the final.
Radek Voltr
Radek Voltr( born 28 November 1991) is a Czech football player who currently plays for 1.
FK Příbram.
2001 Hamlet Cup – Doubles
Jonathan Stark and Kevin Ullyett were the defending champions and won in the final 6 – 1, 6 – 4 against Leoš Friedl and Radek Štěpánek.
Mathieu Montcourt
Mathieu Montcourt( 4 March 1985 – 6 July 2009) was a professional French tennis player.
At the 2006, 2007, and 2009 French Opens, he lost in the second round, to Lleyton Hewitt, Jarkko Nieminen, and Radek Štěpánek respectively.

Question: Were Aleksandr Syomin and Radek Voltr of the same nationality?
Answer: no