Question: What professional sport do Bethanie Matteck-Sands play?
Context: Bethanie Lynn Mattek-Sands (née Mattek; born March 23, 1985) is a U.S. professional tennis player who is presently ranked No. 2 in the women's doubles rankings.  Mattek-Sands is an Olympic Gold Medalist in mixed doubles, has won five Grand Slam titles in women's doubles and two in mixed doubles.  She lives in Phoenix, Arizona. High performance sport or elite sport is sport at the highest level of competition, with elite athletes as the competitors.  In sports administration "high performance sport", where the emphasis is on winning prestigious competitions, is distinguished from "mass sport" or "recreational sport", where the emphasis is on attracting the maximum number of participants.  High performance sport overlaps with professional sport but is not the same; for example, the English football league system and Minor League Baseball include lower divisions whose teams' members are full-time professionals; on the other hand, competitors at the Olympic Games or World Games in some minority sports may be part-time or rely on government grants. Yékini is the nickname of Yakhya Diop (26 February 1974 in Joal), a popular champion of Senegalese wrestling, the most prominent variant of the Lutte Traditionnelle, a West African folk tradition which has become a major professional sport in the last two decades.  From the Serer ethnic group, Yékini is the most successful wrestler since the professionalisation of the sport, and his appearances are major news in his home country.  His 2006 fight against and defeat of Mohamed Ndao, alias Tyson, was billed in Senegal as "the fight of the century", cementing the two as the best known exponents of the sport.  He was defeated by Balla Gaye 2, The Lion of Guédiawaye, at Stade Demba Diop on Sunday 22 April 2012, ending a reign that spanned almost two decades. The term Sports Associations (German: "Sportvereinigung" , ] ) in East Germany (German Democratic Republic, GDR) meant a sports agency for certain economic branches of the whole society, which were members of the East German Sports Association (DTSB).  Members of biggest social employers had their own branch sports clubs or the "Sportvereinigung".  One of the biggest problems is that you can not find almanacs of these today.  All of them were recycled or sold to private persons.  So you can not start an article about each trade sports association, since 2012.  The rest are data banks of history sections from the sport club sites with the certain name or in addition: pennants, medals, flags, and other related objects.  Nevertheless, you can find still a lot of sports societies in the former GDR which use the old names.  After 1954 they separated amateur sport from professional sport, and from 1961, most Trade Sports-Associations of sports societies in the GDR had been closed but existed under single clubs with the name BSG ("Betriebssportgemeinschaft") which meant Cooperative Sports Collective in English.  In 1966, the football sections were separated and they used the name Fußballclub (FC).  They had to conform to the rules of the East German Sports Association.  The sections of the associations were called Sports Clubs (SCs) for only the professional athletes. The organisation of sport in Australia has been largely determined by its Federal system of government – Australian Government and six states and two territories governments and local governments.  All three levels play an important role in terms of funding, policies and facilities.  Each major sport is managed by a national sports organisation, with state counterparts that manage community sporting clubs.  Umbrella or peak organisations represent the interests of sports organisations or particular sport issues.  Education sector plays a small role through universities and schools.  Private sector's involvement is extensive in professional sport through facilities, club ownership and finance/sponsorship. The history of cycling in India dates back to 1938.  The Cycling Federation of India takes care of the sport.  Cycling is unknown as a professional sport in India but popular as a common recreational sport and it is a good way to keep fit. Football in South America is the most popular hobby and professional sport played by the continent's inhabitants.  Football was introduced to South America in the nineteenth century thanks to the worldwide diffusion of British culture caused by the British diaspora and the acceptance of the sport by the region's Anglophile elite.  Widely regarded as a symbol of modernity and good health, football overtime displaced older fashionable sports such as Bochas to become, by the middle of the twentieth century, the primary mainstream sport throughout most of the continent. Women's sport in Australia started in the colonial era.  Sport made its way into the school curriculum for girls by the 1890s.  World War II had little impact on women's sport in the country.  After the war, women's sport diversified as a result of new immigrants to the country.  In the 1990s, the percentage of media coverage for women's sport on radio, television and in newspapers was not at parity with male sport.  Basketball is nominally professional in Australia but players do not earn enough from the sport to compete full-time.  Some Australians have gone overseas to play professional sport.  Women make up a large number of television spectators for Australian sport.  In person, netball has large percentage of female spectators.  The Australian Federal and State governments have encouraged women to participate in all areas of sport. Bethanie Mattek-Sands and Sania Mirza were the defending champions, but Mattek-Sands chose not to participate this year.  Mirza played alongside Martina Hingis and successfully defended her title, defeating Caroline Garcia and Kristina Mladenovic in the final, 1–6, 7–5, [10–5]. A fantasy sport (also known less commonly as rotisserie or roto) is a type of online game where participants assemble imaginary or virtual teams of real players of a professional sport.  These teams compete based on the statistical performance of those players' players in actual games.  This performance is converted into points that are compiled and totaled according to a roster selected by each fantasy team's manager.  These point systems can be simple enough to be manually calculated by a "league commissioner" who coordinates and manages the overall league, or points can be compiled and calculated using computers tracking actual results of the professional sport.  In fantasy sports, team owners draft, trade and cut (drop) players, analogously to real sports.
Answer: U.S. professional tennis player