Question: Who was born first, Stan Wawrinka or Sandy Mayer?

full_context: Document 1: Mats Wilander: Mats Wilander (] ; born 22 August 1964) is a former World No. 1 tennis player from Sweden. From 1982 to 1988, he won seven Grand Slam singles titles (three at the French Open, three at the Australian Open, and one at the US Open), and one Grand Slam men's doubles title (at Wimbledon).
Document 2: Gene Mayer: Gene Mayer (born April 11, 1956) is a former tennis player from the United States who won 14 singles titles during his career.
Document 3: Stan Wawrinka career statistics: This is a list of the main career statistics of Swiss professional tennis player, Stan Wawrinka. To date, Wawrinka has won sixteen ATP singles titles, including three Grand Slam singles titles at the 2014 Australian Open, the 2015 French Open, and the 2016 US Open, and one ATP Masters 1000 title at the 2014 Monte-Carlo Rolex Masters. He was also a semifinalist at the 2013 US Open, the 2015 Australian Open, the 2015 US Open, and the 2013, 2014 and 2015 ATP World Tour Finals. He also has reached the quarterfinals at 2014 and 2015 Wimbledon. Wawrinka also won a gold medal partnering Roger Federer in men's doubles for Switzerland in the 2008 Summer Olympics in Beijing, beating Swedish team Simon Aspelin and Thomas Johansson. In 2014 Wawrinka was part of the Swiss National Team, winning the Davis Cup for the first time.
Document 4: Sandy Mayer: Alexander "Sandy" Mayer (born April 5, 1952) is a former tennis player from the United States, who won ten titles in singles and twenty-four titles in doubles during his professional career. He was part of the winning tennis squad at Stanford University in 1973.
Document 5: 2016 US Open – Men's Singles: Novak Djokovic was the defending champion, but lost in the final to Stan Wawrinka, 7–6, 4–6, 5–7, 3–6. This was the first time the men's singles champion at the US Open won the match after losing the first set since Juan Martín del Potro in 2009. This was also the first time the men's singles champion at the US Open won the title after being a match point down since Djokovic in 2011, with Wawrinka having saved a match point against Dan Evans in the 3rd round. As he had done in his 2 previous grand slam titles, Wawrinka again defeated the world No. 1 in the final.
Document 6: Vitas Gerulaitis: Vytautas Kevin Gerulaitis (July 26, 1954 – September 17, 1994) was an American professional tennis player. In 1975, Gerulaitis won the men's doubles title at Wimbledon, partnering with Sandy Mayer. He won the men's singles title at one of the two Australian Open tournaments held in 1977 (Gerulaitis won the tournament that was held in December, while Roscoe Tanner won the earlier January tournament). Gerulaitis also won two Italian Open titles, in 1977 and 1979, and the WCT Finals in Dallas, in 1978.
Document 7: 2017 US Open – Men's Singles: Stan Wawrinka was the defending champion, but was unable to defend the title due to a knee injury that ended his season prematurely. Wawrinka's withdrawal ended his streak of 50 consecutive grand slam appearances, dating back to the 2005 French Open.
Document 8: 1981 Stockholm Open: The 1981 Stockholm Open was a men's tennis tournament played on hard courts and part of the 1981 Volvo Grand Prix and took place in Stockholm, Sweden. The tournament was held from 2 November through 8 November 1981. Third seeded Gene Mayer won the singles title after a victory in the final against his brother Sandy.
Document 9: Sandra Reynolds: Sandra Reynolds Price ("née" Reynolds; born 4 March 1934) is a former tennis player from South Africa who won four Grand Slam women's doubles championships and one Grand Slam mixed doubles championship. Her best Grand Slam singles result was reaching the 1960 Wimbledon final, losing to Maria Bueno 8–6, 6–0. Reynolds is the only female player from South Africa to have reached the Wimbledon singles final, and she is one of three to have reached a singles final in a Grand Slam. In 1961, she was seeded no. 1 for the Wimbledon Ladies Singles Championship, making her the only South African player (man or woman) ever to be seeded first in a Grand Slam singles event. She was the runner-up at the 1959 , losing to Sally Moore in the final. Price won the German Championships in 1960, 1961, and 1962. She was the runner-up at the 1959 Italian Championships, having defeated Bueno in a semifinal, then losing to Christine Truman in the final.
Document 10: Marin Čilić career statistics: This is a list of the main career statistics of Croatian professional tennis player, Marin Čilić. To date, Čilić has won 16 ATP singles titles including one grand slam singles title at the 2014 US Open, one ATP Masters 1000 title at the 2016 Western & Southern Open and a record four titles at the PBZ Zagreb Indoors. Other highlights of Čilić's career thus far include a semi-final appearance at the 2010 Australian Open and three consecutive quarterfinals at the Wimbledon Championships from 2014 to 2016. Čilić achieved a career high singles ranking of World No. 6 on November 21st, 2016.
Document 11: 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 12: Stan Wawrinka: Stanislas Wawrinka (] ; born 28 March 1985) is a Swiss professional tennis player. Professionally called "Stan", he reached a career-high Association of Tennis Professionals (ATP) world No. 3 singles ranking for the first time on 27 January 2014. His career highlights include three Grand Slam titles at the 2014 Australian Open, 2015 French Open and 2016 US Open, where he defeated the world No. 1 player in the final on all three occasions, reaching the final of the 2017 French Open, winning an ATP World Tour Masters 1000 title at the Monte-Carlo Masters in 2014, and reaching three other finals at 2008 Rome, 2013 Madrid and 2017 Indian Wells. He is sometimes considered as part of the newly established "Big Five", an expansion of the Big Four, which already consists of Roger Federer, Rafael Nadal, Novak Djokovic and Andy Murray.
Document 13: Guadalajara Open: The Guadalajara Open is a defunct tennis tournament that was played on the Grand Prix tennis circuit in 1978. The event was held in Guadalajara, Mexico and was played on outdoor clay courts. Gene Mayer won the singles title while Sandy Mayer and Sherwood Stewart partnered to win the doubles title.
Document 14: 2014 Stan Wawrinka tennis season: The 2014 Stan Wawrinka tennis season began at the Chennai Open, where he won the title for the second time in his career. This was followed by victory at the Australian Open, where he defeated defending champion Novak Djokovic in the quarterfinals, followed by victory over world no. 1 Rafael Nadal in the final, to win his first ever Grand Slam title, launching him to a career-high no. 3 in the world, and the Swiss no. 1 (ahead of Roger Federer) for the first time in his career. Additionally, he won his first Masters 1000 title, defeating compatriot Federer in the final after coming back from a set down. During the first half of the season, Wawrinka went a perfect 6–0 against top-10 opponents, including wins against three of the "Big Four" (Djokovic, Nadal, and Federer). He also reached the semifinals of the ATP World Tour Finals for the second time in a row and finished the year helping Switzerland win their first Davis Cup.
Document 15: 2015 Stan Wawrinka tennis season: The 2015 Stan Wawrinka tennis season began at the Chennai Open, where he won the title for the third time in his career. This was followed by an unsuccessful defense of his title at the Australian Open, where he lost in the semi-finals to eventual champion Novak Djokovic in five sets. A few months later, after a relatively unsuccessful clay season, Stan won his second major title at the French Open, defeating Roger Federer and Novak Djokovic in the process.
ground_truth: Alexander "Sandy" Mayer