Question: John Peers and Jared Palmer, have which occupation in common?

full_context: Document 1: 2016 Brisbane International – Men's Doubles: Jamie Murray and John Peers were the defending champions, but Murray chose to compete in Doha instead. Peers played alongside Henri Kontinen and successfully defended his title, defeating James Duckworth and Chris Guccione in the final, 7–6, 6–1.
Document 2: 2016 German Open – Doubles: Jamie Murray and John Peers were the defending champions, but Murray chose to participate in the Davis Cup quarterfinals instead. Peers played alongside Henri Kontinen and successfully defended the title, defeating Daniel Nestor and Aisam-ul-Haq Qureshi in the final, 7–5, 6–3.
Document 3: Donald Johnson: Donald James "Don" Johnson (born September 9, 1968) is a former professional tennis player from the United States who reached the World No. 1 doubles ranking in 2002. Although born in Bethlehem, Pennsylvania, he was raised and learned the sport of tennis in the Pittsburgh suburb of Mt. Lebanon, Pennsylvania. Johnson attended Fairview High School in Erie, Pennsylvania, and won the PIAA State Singles Championship in 1984. During his career, he won the Wimbledon men's doubles title in 2001 (partnering Jared Palmer), and the Wimbledon mixed doubles title in 2000 (partnering Kimberly Po). He also won the doubles title at the Tennis Masters Cup in 2000 (partnering Piet Norval). He won a total of 23 top-level doubles titles.
Document 4: John Peers: John William Peers (born 25 July 1988) is an Australian professional tennis player who competed mainly on the ATP Challenger Tour both in singles and doubles until 2013, when he began to focus solely on doubles and began competing on the ATP World Tour.
Document 5: 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 6: 2014 Aegon Trophy – Men's Doubles: Jamie Murray and John Peers were the defending champions, but decided not to compete.
Document 7: 2015 Wimbledon Championships – Men's Doubles: Vasek Pospisil and Jack Sock were the defending champions, but lost in the third round to Jamie Murray and John Peers. Jean-Julien Rojer and Horia Tecău won the title by defeating Murray and Peers in the final by a score of 7–6, 6–4, 6–4.
Document 8: Brad Drewett: Brad Drewett (19 July 1958 – 3 May 2013) was an Australian tennis player and ATP official. He was the 1975 and 1977 Australian Open Junior champion and the youngest player at age 17 to win the title since Ken Rosewall and John Newcombe. He was also the third-youngest Australian Open quarter-finalist in his first Grand Slam, at 17 years 5 months in 1975, behind Boris Becker, 17 years 4 days in 1984 and Goran Ivanišević, 17 years 4 months in 1989.
Document 9: 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 10: Jared Palmer: Jared Eiseley Palmer (born July 2, 1971) is a professional tennis player who won 28 professional doubles titles and one singles title in his career on the ATP Tour. He also won four double titles on the challenger's circuit (two in 1992 and two in 1993). Palmer turned professional in 1991 after winning the 1991 NCAA Division 1 singles title as a sophomore playing for Stanford University.
Document 11: Pete Sampras career statistics: This is a list of the main career statistics of American former tennis player Pete Sampras. He turned professional in 1988 and his official retirement occurred in August 2003. During his career Sampras won 64 singles titles, including 14 titles at Grand Slam events. He competed in 16 ties for the United States Davis Cup team between 1991 and 2002 and was a member of the cup winning team in 1992 and 1995. Sampras reached the No. 1 ranking on April 12, 1993 and in total held that position for 286 weeks.
Document 12: Jean-Julien Rojer: 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.
Document 13: Pete Sampras: Pete Sampras (born August 12, 1971) is a retired American tennis player widely regarded as one of the greatest in the history of the sport. He was a right-handed player with a single-handed backhand and a precise and powerful serve that earned him the nickname "Pistol Pete". His professional career began in 1988 and ended at the 2002 US Open, which he won, defeating rival Andre Agassi in the final.
Document 14: 2001 Franklin Templeton Classic – Doubles: Jared Palmer and Richey Reneberg were the defending champions but only Palmer competed that year with Donald Johnson.
Document 15: Jesse Palmer: Jesse James Palmer (born October 5, 1978) is a Canadian sports commentator and former college and professional football player who was a quarterback in the National Football League (NFL) for five seasons in the early 2000s. Palmer played college football for the University of Florida, and thereafter, he played professionally for the New York Giants and San Francisco 49ers in the NFL before spending half of the 2006 season with the Montreal Alouettes of the Canadian Football League (CFL). Palmer was cast in 2004 as the bachelor on the fifth season of the reality television series "The Bachelor". He went on to become a college football analyst for ESPN/ABC in the United States, and has been a columnist for the website of Canada's The Sports Network in Canada. He is also a contributor to ABC's "Good Morning America"
ground_truth: professional tennis player