Question: Kathy Jordan and Jack Sock, share which occupation?

full_context: Document 1: Janko Tipsarević: Janko Tipsarević (, ] ; born 22 June 1984) is a Serbian professional tennis player. His career-high singles ranking is world No. 8, achieved on 2 April 2012. In his career, he has won four ATP World Tour titles, one ATP doubles title, three Futures, and 15 Challenger titles. Tipsarević also won the 2001 Australian Open Junior title. Tipsarević has achieved two victories over a World No. 1 player, having defeated compatriot Novak Djokovic twice. He also has thirteen victories against other players in the top 10: four wins against Tomáš Berdych, and one each against Fernando González, Mikhail Youzhny, David Ferrer, James Blake, Gaël Monfils, Andy Murray and Juan Mónaco. He holds victories over former World No. 1 players Carlos Moyá, Marat Safin, Lleyton Hewitt, Juan Carlos Ferrero and Andy Roddick. His best results at a Grand Slam have been reaching the quarterfinals at the US Open in 2011 and 2012. He is only the second Serb to reach the final 16 at all four different grand slams.
Document 2: Margaret Court career statistics: This is a list of the main career statistics of Australian former tennis player Margaret Court. She won 64 Grand Slam events (24 singles, 19 doubles, 21 mixed doubles), which is a record for a male or female player. Her 24 Grand Slam singles titles and 21 in mixed doubles are also all-time records for both sexes. She achieved a career Grand Slam in singles, doubles, and mixed doubles. She is one of two women to have achieved "the" calendar year Grand Slam in singles in the Open Era (alongside Steffi Graf), and is the only woman to have achieved the mixed doubles Grand Slam, which she did twice.
Document 3: 1986 Wimbledon Championships – Women's Doubles: Kathy Jordan and Elizabeth Smylie were the defending champions but they competed with different partners that year, Jordan with Alycia Moulton and Smylie with Catherine Tanvier.
Document 4: Melanie Oudin: Melanie Oudin (born September 23, 1991) is a former American tennis player and former world junior No. 2. She was a member of the American Fed Cup team from 2009 to 2011 and winner of the 2011 US Open mixed doubles title, with fellow American player Jack Sock.
Document 5: Jim Courier: James Spencer Courier Jr. (born August 17, 1970) is an American former World No. 1 professional tennis player. During his career, he won four Grand Slam singles titles, two at the French Open and two at the Australian Open. He holds the record for being the youngest man to have reached the finals of all four Grand Slam singles tournaments, at the age of 22 years and 11 months. He also won five Masters 1000 series titles. Until Novak Djokovic in 2016, Courier was the last man to win both the Australian and French Opens in the same calendar year.
Document 6: 1987 Wimbledon Championships – Mixed Doubles: Kathy Jordan and Ken Flach were the defending champions but lost in the quarterfinals to Patty Fendick and Andy Kohlberg.
Document 7: Andy Roddick: Andrew Stephen Roddick (born August 30, 1982) is an American former professional tennis player from the US.
Document 8: Kathy Jordan: 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.
Document 9: Barbara Jordan (tennis): Barbara Jordan (born April 2, 1957) is a former professional female tennis player from the United States who won the 1979 Australian Open singles title.
Document 10: John Isner: John Robert Isner (born April 26, 1985) is an American professional tennis player who is currently ranked world No. 17 in men's singles by the Association of Tennis Professionals (ATP). Considered one of the best servers of the ATP World Tour, Isner achieved his career-high singles ranking of world No. 9 in April 2012. In 2013, he became the 18th player to serve more than 5,000 aces on the ATP World Tour. He currently has 4th-most aces in the history of ATP, having served more than 8,800 aces. At the 2010 Wimbledon Championships, he played the longest professional tennis match in history, defeating Nicolas Mahut in a total of 11 hours and 5 minutes of play over the course of three days. He also played the then 10th-longest singles match, a 5-hour 41-minute encounter in the second round of the 2012 French Open.
Document 11: Vasek Pospisil: Vasek Pospisil (, ] ; born June 23, 1990) is a Canadian professional tennis player. He is the No. 3 male ranked player in Canada, after Milos Raonic and Denis Shapovalov. Pospisil has a career-high World singles ranking of 25, and No. 4 in doubles. As Canada's currently ranked No. 3 in singles and No. 3 in doubles, he is an important member of the Canada Davis Cup team. Along with partner Jack Sock, he won the 2014 Wimbledon Championships and the 2015 Indian Wells Masters men's doubles titles. He also reached the quarterfinals in singles at the 2015 Wimbledon Championships.
Document 12: 1983 Virginia Slims of Boston – Doubles: Kathy Jordan and Anne Smith were the defending champions but lost in the final 6–3, 6–1 against Jo Durie and Ann Kiyomura.
Document 13: Nick Kyrgios: Nicholas Hilmy Kyrgios ( ; born 27 April 1995) is an Australian professional tennis player who is currently ranked world No. 20 in men's singles by the Association of Tennis Professionals (ATP). He won the boys' singles event at the 2013 Australian Open and the boys' doubles event at the 2013 Wimbledon Championships. Kyrgios' biggest achievements are reaching the quarterfinals of the 2014 Wimbledon Championships—defeating ATP number 1 Rafael Nadal and Richard Gasquet en route—and the quarterfinals of the 2015 Australian Open. Kyrgios is the second player after fellow Aussie Lleyton Hewitt to beat Roger Federer, Rafael Nadal and Novak Djokovic in their first meeting. He has been controversial at times, for example admitting in 2017 that he had "probably" tanked at eight tournaments during his professional career, because on certain days he’d "rather be doing something else than play tennis".
Document 14: Jack Sock: Jack Sock (born September 24, 1992) is an American professional tennis player who is currently ranked world No. 21 in men's singles by the Association of Tennis Professionals (ATP). He is one of the top ranked American men in both singles and doubles on the ATP Tour. A former junior US Open champion, Sock's singles success is highlighted by 7 ATP finals, including three titles. His career best result came at the 2017 Indian Wells Masters, where he reached the semi-finals.
Document 15: 1983 Australian Open – Women's Singles: First-seeded Martina Navratilova defeated ninth-seeded Kathy Jordan 6–2, 7–6 in the final to win the Women's Singles title at the 1983 Australian Open tennis tournament. The tournament was played on grass courts at the Kooyong Stadium in Melbourne from 29 November through 11 December 1983. Navratilova earned $75,000 prize money for winning the title, her 8th career Grand Slam singles title and her 2nd title at the Australian Open after 1981. She improved her year record to 86 wins and 1 loss. This tournament was also notable for being the first Australian Open in which Steffi Graf appeared in the main draw, and the last time that Billie Jean King appeared in the main singles draw of a grand slam.
ground_truth: tennis player