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

Context paragraphs:
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.

1993 Volvo International – Doubles: The 1993 Volvo International was a tennis tournament played on outdoor hard courts at the Cullman-Heyman Tennis Center in New Haven, Connecticut, United States and was part of the Championship Series of the 1993 ATP Tour.  The tournament ran from August 16 through August 23, 1993.  Kelly Jones and Rick Leach were the defending champions but only Jones competed that year with Paul Annacone.  Annacone and Jones lost in the semifinals to Cyril Suk and Daniel Vacek.  Suk and Vacek won in the final 7–5, 6–4 against Steve DeVries and David Macpherson.

1999 Porsche Tennis Grand Prix – Doubles: The 1999 Porsche Tennis Grand Prix – Doubles was the tennis doubles event at the 1999 Porsche Tennis Grand Prix, the twenty-second edition of the most prestigious tournament in Baden-Württemberg.  Lindsay Davenport and Natasha Zvereva were the defending champions, but they did not compete this year.  Davenport competed with Martina Hingis as the first seed, while Zvereva competed with Elena Tatarkova.  Davenport and Hingis withdrew in the quarterfinals due to Davenport having a wrist injury, whilst Tatarkova and Zvereva were knocked out in the first round.

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.

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.

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.

2001 Generali Open – Doubles: Pablo Albano and Cyril Suk were the defending champions but they competed with different partners that year, Albano with Lucas Arnold and Suk with Marius Barnard.

2005 Qatar Open – Doubles: Martin Damm and Cyril Suk were the defending champions.  Damm partnered with Jared Palmer, losing in the first round.  Suk partnered with Pavel Vízner, losing in the quarterfinals.

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.

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.

Supporting paragraphs: Cyril Suk Natasha Zvereva
Answer: tennis player