Question: Which tennis player has received a higher World singles ranking, Xavier Malisse or Virginia Wade?

full_context: Document 1: Chris Evert: Christine Marie Evert (born December 21, 1954), known as Chris Evert Lloyd from 1979 to 1987, is a former World No. 1 professional tennis player from the United States. She won 18 Grand Slam singles championships and three doubles titles. She was the year-ending World No. 1 singles player in 1974, 1975, 1976, 1977, 1978, 1980, and 1981. Overall Evert won 157 singles championships and 32 doubles titles.
Document 2: Félix Auger-Aliassime: Félix Auger-Aliassime (born August 8, 2000) is a Canadian professional tennis player. He reached a career high ATP singles ranking of No. 161 on September 18, 2017 and a career high ITF junior ranking of No. 2 on June 6, 2016. He is the youngest player ever to qualify and to win a main draw match on the ATP Challenger Tour. With his titles at the Open Sopra Steria de Lyon in June 2017 and the Copa Sevilla in September 2017, he became the seventh youngest player in history (16 years, 10 months) to win an ATP Challenger title and the second youngest to win multiple ATP Challenger titles. Auger-Aliassime won the 2016 US Open junior singles title and the 2015 US Open junior doubles title with compatriot Denis Shapovalov.
Document 3: Billie Jean King: Billie Jean King ("née" Moffitt; born November 22, 1943) is an American former World No. 1 professional tennis player. King won 39 Grand Slam titles: 12 in singles, 16 in women's doubles, and 11 in mixed doubles. King won the singles title at the inaugural WTA Tour Championships. King often represented the United States in the Federation Cup and the Wightman Cup. She was a member of the victorious United States team in seven Federation Cups and nine Wightman Cups. For three years, King was the United States' captain in the Federation Cup.
Document 4: 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 5: 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 6: Xavier Malisse: Xavier Malisse (born 19 July 1980) is Belgian retired professional tennis player. Born in the north-western Flemish city of Kortrijk and nicknamed "X-Man", he is only one of two players from Belgium (the other being David Goffin) to have been ranked in the top 20 of the ATP tour, with a career-high singles ranking of World No. 19.
Document 7: Steffi Graf: Stefanie Maria "Steffi" Graf (] ; born 14 June 1969) is a German former tennis player, who was ranked world No. 1 during her career. Graf won 22 Grand Slam singles titles. Her 22 singles titles put her second on the list of Major wins in the female competition since the introduction of the Open Era in 1968 and is third all-time behind Margaret Court (24) and Serena Williams (23). In 1988, she became the first and only tennis player (male or female) to achieve the Golden Slam by winning all four Grand Slam singles titles and the Olympic gold medal in the same calendar year. Furthermore, she is the only tennis player to have won each Grand Slam event at least four times.
Document 8: 2013 Topshelf Open – Men's Singles: David Ferrer was the defending champion, but lost in the first round to Xavier Malisse.<br>
Document 9: Ernests Gulbis: Ernests Gulbis (] , born 30 August 1988, and nicknamed "The Gull" or "Ernie") is a Latvian professional tennis player. In 2008, Gulbis won his first ATP Tour doubles title at the U.S. Men's Clay Court Championships, teaming with Rainer Schüttler, and in 2010 won his first ATP Tour singles title in the Delray Beach, defeating Ivo Karlović in the final. In total, Gulbis has 6 ATP titles to his name and has never lost a final. His best performance at a Grand Slam is reaching the semifinals of the 2014 French Open. He had previously reached the quarterfinals of the 2008 French Open. Gulbis' career-high singles ranking is world No. 10, making him the only Latvian tennis player ever to be ranked inside the top 10 in ATP Singles Ranking. He achieved this in June 2014.
Document 10: Kim Clijsters: Kim Antonie Lode Clijsters (] ; born 8 June 1983) is a Belgian former professional tennis player. Clijsters is a former world No. 1 in both singles and doubles.
Document 11: Margaret Court career statistics: This is a list of the main career statistics of Australian former tennis player Margaret Court. She won 64 Grand Slam events (24 singles, 19 doubles, 21 mixed doubles), which is a record for a male or female player. Her 24 Grand Slam singles titles and 21 in mixed doubles are also all-time records for both sexes. She achieved a career Grand Slam in singles, doubles, and mixed doubles. She is one of two women to have achieved "the" calendar year Grand Slam in singles in the Open Era (alongside Steffi Graf), and is the only woman to have achieved the mixed doubles Grand Slam, which she did twice.
Document 12: 2012 Farmers Classic – Doubles: Xavier Malisse, with fellow countryman Ruben Bemelmans, defended his title, defeating Jamie Delgado and Ken Skupski 7–6, 4–6, [10–7] in the final. Mark Knowles and Malisse were the defending champions but Knowles decided not to participate.
Document 13: Virginia Wade: Sarah Virginia Wade, (born 10 July 1945) is a former professional tennis player from Great Britain. She won three Grand Slam singles championships and four Grand Slam doubles championships, and is the only British woman in history to have won titles at all four Grand Slam tournaments. She was ranked as high as No. 2 in the world in singles, and No. 1 in the world in doubles.
Document 14: Betty Stöve: Betty Stöve (born 24 June 1945) is a Dutch former professional tennis player. She is best remembered for reaching the ladies' singles final at Wimbledon in 1977. She also won ten Grand Slam titles in women's doubles and mixed doubles.
Document 15: Olivier Rochus: Olivier Rochus (] ; born 18 January 1981) is a retired Belgian tennis player. He has won two singles titles in his career and in 2004 won the French Open doubles title partnering fellow Belgian Xavier Malisse. Rochus' career-high singles ranking is World No. 24.
ground_truth: Virginia Wade