Question: Patrick McEnroe and Billie Jean King shared being known for playing what sport?

full_context: Document 1: Patrick McEnroe: Patrick John McEnroe (born July 1, 1966) is a former professional tennis player and the former captain of the United States Davis Cup team.
Document 2: 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 3: Peter Fleming (tennis): Peter Blair Fleming (born January 21, 1955 in Chatham Borough, New Jersey) is a former professional tennis player from the United States. In his doubles partnership with John McEnroe, he won 52 titles, of which seven were at Grand Slams (four at Wimbledon, three at the US Open). As a singles player, he peaked at World No. 8, winning three titles (including the 1979 Cincinnati Open).
Document 4: 2010 Billie Jean King Cup: The 2010 Billie Jean King Cup was the 2nd edition of this tennis exhibition tournament. Seven-time Grand Slam champion Venus Williams, 2009 French Open Champion Svetlana Kuznetsova, and 2009 US Open Champion Kim Clijsters participated. 2009 Australian Open and Wimbledon Champion Serena Williams had to withdraw from the event due to a leg injury. She was replaced by 2008 French Open Champion Ana Ivanovic. In the first semifinal, Clijsters defeated Ivanovic in a tiebreaker (7–2), despite Ivanovic having match point at 5–4 up. Williams defeated Kuznetsova in the second semifinal, 6–4. Williams defeated Clijsters in the championship match by a score of 6–4 3–6 7–5.
Document 5: 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 6: 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 7: Rick Macci: Rick Macci (born December 7, 1954) is a United States Professional Tennis Association (USPTA) Master Professional, and seven-time USPTA national coach of the year who has trained five number one ranked players—Andy Roddick, Jennifer Capriati, Maria Sharapova, Serena Williams, and Venus Williams.
Document 8: Pete Sampras: Pete Sampras (born August 12, 1971) is a retired American tennis player widely regarded as one of the greatest in the history of the sport. He was a right-handed player with a single-handed backhand and a precise and powerful serve that earned him the nickname "Pistol Pete". His professional career began in 1988 and ended at the 2002 US Open, which he won, defeating rival Andre Agassi in the final.
Document 9: 2013 French Open – Legends Over 45 Doubles: John McEnroe and Patrick McEnroe were the defending champions, but Patrick McEnroe did not participate.<br>
Document 10: Althea Gibson: Althea Gibson (August 25, 1927 – September 28, 2003) was an American tennis player and professional golfer, and the first black athlete to cross the color line of international tennis. In 1956, she became the first person of color to win a Grand Slam title (the French Open). The following year she won both Wimbledon and the U.S. Nationals (precursor of the U.S. Open), then won both again in 1958, and was voted Female Athlete of the Year by the Associated Press in both years. In all, she won 11 Grand Slam tournaments, including six doubles titles, and was inducted into the International Tennis Hall of Fame and the International Women's Sports Hall of Fame. "She is one of the greatest players who ever lived," said Robert Ryland, a tennis contemporary and former coach of Venus and Serena Williams. "Martina couldn't touch her. I think she'd beat the Williams sisters." In the early 1960s she also became the first black player to compete on the women's professional golf tour.
Document 11: Jennifer Capriati: 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.
Document 12: 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 13: Patrick Galbraith: Patrick Galbraith (born April 16, 1967, in Tacoma, Washington) is a former professional tennis player from the United States.
Document 14: Billie Jean King Leadership Initiative: The Billie Jean King Leadership Initiative (BJKLI) is a leadership and diversity Nonprofit organization, founded by Billie Jean King in 2014. The BJKLI was created to address the critical issues required to achieve inclusive leadership that will lead to significant changes in how women and men operate in the world.
Document 15: Paul Annacone: Paul Annacone (born March 20, 1963) is an American former touring professional tennis player and current tennis coach. He is the former coach of open-era leader in Grand Slams Roger Federer and former World No. 1 Pete Sampras. Annacone is currently a coach at ProTennisCoach.com and a commentator at Tennis Channel
ground_truth: tennis