Question: Which tennis player is older, Mariaan de Swardt or John Peers? 

full_context: Document 1: Mariaan de Swardt: Mariaan de Swardt (born 18 March 1971) is a former tennis player from South Africa, who played as a professional from 1988 to 2001. She twice represented her native country at the Summer Olympics, in 1992 and 1996, and was a member of the South African Fed Cup Team in 1992 and 1994–1997. In 2006, de Swardt became a U.S. citizen.
Document 2: Jennifer Capriati: Jennifer Maria Capriati (born March 29, 1976) is an American former professional tennis player. A member of the International Tennis Hall of Fame, she won three singles championships in Grand Slam tournaments and a gold medal at the 1992 Summer Olympics in Barcelona, reached the World No. 1 ranking, and is considered one of the greatest tennis players of all time.
Document 3: 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 4: 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 5: 1998 Boston Cup – Singles: Mariaan de Swardt won in the final 3–6, 7–6, 7–5 against Barbara Schett.
Document 6: Martina Hingis: Martina Hingis (born 30 September 1980) is a Swiss professional tennis player, a former world No. 1 singles player and currently ranked world No. 2 in doubles by the WTA. She has spent a total of 209 weeks as the singles No. 1 and has won five Grand Slam singles titles, thirteen Grand Slam women's doubles titles, winning a calendar-year doubles Grand Slam in 1998, and seven Grand Slam mixed doubles titles; for a combined total of twenty-five major titles. In addition, she has won the season-ending WTA Championships two times in singles and three times in doubles, and an Olympic silver medal.
Document 7: 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 8: 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 9: Mara Santangelo: Mara Santangelo (born 28 June 1981) is a former professional tennis player from Italy. She retired from the sport on 28 January 2011.
Document 10: Maria Sharapova: Maria Yuryevna Sharapova (Russian: Мари́я Ю́рьевна Шара́пова ; ] ; born April 19, 1987) is a Russian professional tennis player. A United States resident since 1994, Sharapova has competed on the WTA tour since 2001. She has been ranked world No. 1 in singles by the WTA on five separate occasions, for a total of 21 weeks. She is one of ten women, and the only Russian, to hold the career Grand Slam. She is also an Olympic medalist, having earned silver for Russia in women's singles at the 2012 Summer Olympics in London.
Document 11: 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 12: 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 13: 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 14: Hana Mandlíková: Hana Mandlíková (born 19 February 1962) is a former professional tennis player from Czechoslovakia who later obtained Australian citizenship. During her career, she won four Grand Slam singles titles: the 1980 Australian Open, 1981 French Open, 1985 US Open, and the 1987 Australian Open. She was also the runner-up at four Grand Slam singles events, including the Wimbledon finals of 1981 and 1986, and won one Grand Slam women's doubles title, the 1989 US Open with Martina Navratilova.
Document 15: 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.
ground_truth: Mariaan de Swardt