Question: Who was born first, Stan Wawrinka or Sandy Mayer?
Context: 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. Mel Purcell and Stan Smith were the defending champions but lost in the quarterfinals to Wojciech Fibak and 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. 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. 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. Gene Mayer and Sandy Mayer were the defending champions and were one of sixteen teams in the second round. 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. 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. 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. 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.
Answer: Alexander "Sandy" Mayer