Question: Which tennis player, Sandy Mayer or Jennifer Capriati, won ten titles in singles and twenty-four titles in doubles?
Context: Meredith McGrath (born April 28, 1971) is a former professional tennis player.  She was born in Midland, Michigan, USA and made her debut on the Women's Tennis Association tour in 1988.  In her eight-year professional career Meredith achieved career-high world rankings of #18 in singles and #4 in doubles.  She notched victories over such players as Martina Navratilova, Martina Hingis, Anna Kournikova, Jana Novotna, Arantxa Sanchez Vicario, and Gigi Fernandez.  The pinnacle of her career came in reaching the singles semi-finals and doubles finals at the 1996 Wimbledon Championships.  In the singles she defeated Mana Endo, Amanda Coetzer, Nancy Feber, Katarína Studeníková and Mary Joe Fernandez before losing to Arantxa Sánchez Vicario.  An injury the week prior to the 1996 Wimbledon Championships eventually ended her career.  Meredith won the 1995 U.S. Open Mixed Doubles Championship (she was runner-up in 1989) and was the runner-up in the 1994 Australian Open Doubles Championship.  Meredith won three WTA singles titles: Oklahoma City and Eastbourne in 1994 and Birmingham in 1996, 25 doubles titles.  She retired with a 140–83 record in singles and a 189–40 record in doubles.  Meredith was recognized by Tennis Magazine as the WTA Comeback Player of the Year as she overcame near career-ending injuries to having her most successful competitive season in 1996.  In 1994 she received the WTA Tour Comeback Player of the Year. Jennifer Capriati Tennis (known as The Tennis Tournament: Grandslam in Europe) is a Sega Genesis video game developed by System Sacom and released in 1992.  In 1994 it was released in the classic range by Sega as Grandslam (Classic).  The game is named after Jennifer Capriati, one of the world's top-ranked female tennis players at the WTA Tour during the time of the game's release. Jorge Lozano (born 17 May 1963 in San Luis Potosí) is a retired professional tennis player from Mexico.  He reached his highest doubles ranking of World No. 4 in August 1988.  His highest singles ranking was World No. 51, achieved the following month.  During his career, he won two mixed doubles titles at the French Open: in 1990 with Arantxa Sánchez, and in 1988 with Lori McNeil.  He reached the round of 16 in singles at the 1988 US Open and also the semifinal in doubles that same year.  Qualified twice for the Doubles Masters at the Royal Albert Hall in London and reached the semifinals in 1988.  In his career, he won nine doubles titles, but no singles titles.  He turned professional in 1986, and in his career, he won $U.S.739,424 in prize money.  He was the first player to be beaten by Pete Sampras in the main draw of a Grand Slam tournament, at the French Open in 1989.  In Davis Cup play, represented Mexico for 15 years, 1981–1995, won 12 doubles matches, and lost 12 as well.  He lost 11 singles matches, and won 8, making his overall win / loss record at the Davis Cup 20–23.  Lozano won his first title at Forest Hills in 1988, with his partner Todd Witsken, and won his last at Athens in 1993.  He resides in Guadalajara, Mexico where he directs a tennis academy for kids and also coaches the men and women tennis team at the University Tec de Monterrey.  He is currently the captain of the Mexican Davis Cup Team. 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. 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. Rishika Sunkara (born 14 May 1993) is an Indian tennis player.  She has won ten titles on the ITF Women's Circuit; two in singles and eight in doubles (4 in 2015 of which 3 were won with Sowjanya Bavisetti).  On 9 November 2015, she reached her best singles ranking of world number 441.  On 5 August 2013, she peaked at world number 375 in the doubles rankings. 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. 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. Sloane Stephens (born March 20, 1993) is an American tennis player.  She has won five WTA singles titles, including her first major at the 2017 US Open.  With the victory, she became the lowest ranked player (83rd) to ever win the women's singles title and the first American woman outside the Williams sisters to win a Slam since Jennifer Capriati in 2002. Pamela Howard Shriver (born July 4, 1962) is an American former professional tennis player known primarily as a doubles specialist with success also as a singles player.  She currently is a tennis broadcaster for ESPN.  During the 1980s and 1990s, she won 133 titles, including 21 women's singles titles, 111 women's doubles titles and one mixed doubles title.  In Grand Slam tournaments, Shriver won 21 doubles titles and one mixed doubles title.  She also won a women's doubles gold medal at the 1988 Olympic Games in Seoul with Zina Garrison as her partner.
Answer: Alexander "Sandy" Mayer