Question: Cyril Suk and Natasha Zvereva, have which mutual occupation?

full_context: Document 1: Martina Navratilova: Martina Navratilova (Czech: "Martina Navrátilová" ] ; born Martina Šubertová ] ; October 18, 1956) is a former Czechoslovak and later American tennis player and coach. In 2005, "Tennis" magazine selected her as the greatest female tennis player for the years 1965 through 2005 and she is considered one of the best, if not the best, female tennis players of all time.
Document 2: Natasha Zvereva: Natasha Zvereva, or Zverava, (born Natallya Maratawna Zverava; Belarusian: Наталля Маратаўна Зверава; 16 April 1971) is a former tennis player from Belarus. Zvereva was the first major athlete in the Soviet Union to demand publicly that she should be able to keep her tournament earnings. The team of Zvereva and Gigi Fernández won more women's doubles titles and Grand Slam women's doubles championships than any other team since that of Martina Navratilova and Pam Shriver.
Document 3: Zina Garrison: Zina Lynna Garrison (born November 16, 1963) is a former professional tennis player from the United States. During her career, she was a women's singles runner-up at Wimbledon in 1990, a three-time Grand Slam mixed doubles champion, and a women's doubles gold medalist and singles bronze medalist at the 1988 Olympic Games. She is currently coaching Taylor Townsend.
Document 4: Vera Zvonareva: Vera Igorevna Zvonareva (Russian: Ве́ра И́горевна Звонарёва ; ] ; born 7 September 1984) is a Russian professional tennis player. She was introduced to tennis at the age of six and turned professional in 2000. Her career high is world No. 2 by the WTA. Zvonareva has won twelve WTA Tour singles titles and reached the finals of the 2008 WTA Tour Championships, 2010 Wimbledon Championships, and 2010 US Open. She also was a bronze medalist at the 2008 Beijing Olympics. In doubles, she has won four Grand Slam titles. Two of the titles came in women's doubles, the first one at the 2006 US Open, partnering Nathalie Dechy, and the other at the 2012 Australian Open, partnering Svetlana Kuznetsova. Her other two came in mixed doubles, the first at the 2004 US Open, partnering Bob Bryan, and her second at the 2006 Wimbledon Championships, partnering Andy Ram.
Document 5: Larisa Neiland: Larisa Savchenko-Neiland (née Savchenko; born 21 July 1966) is a former professional tennis player who represented the Soviet Union and Latvia. A former world number one ranked doubles player, Neiland won two women's doubles Grand Slam titles and four mixed doubles Grand Slam titles. She also won two singles titles and sixty-five doubles titles.
Document 6: 1996 Italian Open – Men's Doubles: Cyril Suk and Daniel Vacek were the defending champions but they competed with different partners that year, Suk with Hendrik Jan Davids and Vacek with Richey Reneberg.
Document 7: 1999 French Open – Women's Doubles: Martina Hingis and Jana Novotná were the defending champions, but they did not compete together this year. Novotná instead partnered with Natasha Zvereva as the first seed, whereas Hingis partnered with Anna Kournikova as the second seed. Novotná and Zvereva retired in their quarterfinal match against Lindsay Davenport and Mary Pierce, but Hingis and Kournikova reached the final where they lost to American sisters Serena and Venus Williams, 6–3, 6–7, 8–6. This was the first Grand Slam for the Williams sisters and would be their first step towards completing a Career Golden Slam in doubles.
Document 8: Radek Štěpánek: Radek Štěpánek (] ; born 27 November 1978) is a professional tennis player from the Czech Republic. His career-high singles ranking is world No. 8 and best doubles ranking is world No. 4. Štěpánek's biggest achievements are reaching two Masters 1000 event finals and the quarterfinals of Wimbledon in 2006, as well as winning the deciding match for Czech Republic's Davis Cup winning team in 2012 and again in 2013. In doubles, he won his first Grand Slam title at the 2012 Australian Open, along with Indian partner Leander Paes, defeating the Bryan Brothers in the final. Paes and Štěpánek also won the men's doubles title at the 2013 US Open, defeating Bruno Soares and Alexander Peya in the final.
Document 9: 1996 US Open – Women's Doubles: Gigi Fernández and Natasha Zvereva were the defending champions and successfully defended their title, defeating Jana Novotná and Arantxa Sánchez Vicario 1–6, 6–1, 6–4 in the final. It was the 5th US Open, 15th Grand Slam and 66th overall title for Fernández, and the 4th US Open, 15th Grand Slam and 60th overall title, in their respective careers.
Document 10: Cyril Suk: Cyril Suk III (born 29 January 1967) is a former professional tennis player. A doubles specialist, Suk won one Grand Slam men's doubles title and four Grand Slam mixed doubles titles during his career.
Document 11: 1997 Wimbledon Championships – Mixed Doubles: Helena Suková and Cyril Suk were the defending champions and won in the final 4–6, 6–3, 6–4 against Larisa Neiland and Andrei Olhovskiy.
Document 12: 2006 Ordina Open – Men's Doubles: Cyril Suk and Pavel Vízner were the defending champions, but did not play together this year. Suk partnered Robin Vik, losing in the first round. Vízner partnered Lukáš Dlouhý, losing in the semifinals.
Document 13: 1999 US Open – Men's Doubles: Sandon Stolle and Cyril Suk were the defending champions, but Stolle competed with Wayne Black, while Suk competed with Donald Johnson this year. Suk and Johnson were defeated by Stolle and Black in the third round, while Stolle and Black were defeated by Andrei Olhovskiy and David Prinosil in the quarterfinals.
Document 14: 1996 Davidoff Swiss Indoors – Doubles: Cyril Suk and Daniel Vacek were the defending champions but they competed with different partners that year, Suk with Petr Korda and Vacek with Yevgeny Kafelnikov.
Document 15: Helena Suková: Helena Suková (] ) (born 23 February 1965) is a former professional tennis player from the Czech Republic. During her career, she won 14 Grand Slam doubles titles, 9 of them in women's doubles and 5 of them in mixed doubles. She also was a four-time Grand Slam singles runner-up and won 10 singles titles and 69 doubles titles.
ground_truth: tennis player