Question: Were both Bob Lutz and Billie Jean King professional tennis players?
Context: 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. William Hester, also known as Slew Hester (May 7, 1912 - February 8, 1993) was an American tennis player and official.  He was the president of the United States Tennis Association from 1977 to 1978.  He was the first president of the USTA from the Deep South.  He moved the USTA out of the West Side Tennis Club into the USTA National Tennis Center (now known as the USTA Billie Jean King National Tennis Center).  In spite of protests against the apartheid regime from African nations and civil rights activists, Hester let South Africa compete in two tournaments against the United States, first in Newport Beach, California in April 1977 and next at Vanderbilt University in Nashville, Tennessee in March 1978.  He was inducted into the International Tennis Hall of Fame in 1981. Robert Lutz (born August 29, 1947) is a former amateur and professional tennis player of the 1960s and 1970s.  He and his longtime partner Stan Smith were one of the best doubles teams of all time.  Bud Collins ranked Lutz as World No. 7 in 1972.  Between 1967 and 1977 he was ranked among the top-10 American players 8 times, with his highest ranking being No. 5 in both 1968 and 1970. 100 Greatest of All Time was a television series of five one-hour episodes, produced and first aired by Tennis Channel in March 2012.  It presented a list of the "100 greatest tennis players of all time", both men and women.  The series was hosted by Jack Nicklaus, Jerry Rice, Wayne Gretzky, Lisa Leslie and Carl Lewis.  Many retired tennis luminaries provided commentary, including Rod Laver, Billie Jean King, Chris Evert, Björn Borg, John McEnroe, Martina Navratilova, Pete Sampras, and Andre Agassi. The 1973 WTA Tour was composed of the third annual Virginia Slims Circuit and Commercial Union Assurance Grand Prix, a tour of tennis tournaments for female tennis players, sponsored by Virginia Slims cigarettes.  It was also the year that the WTA Tour was officially formed by Billie Jean King following a meeting held in the Gloucester Hotel in London during the week before Wimbledon. Tennis on HBO is a television program produced by the premium cable television network HBO that broadcasts the main professional tennis tournaments in the United States.  In 1975, HBO began airing coverage (same day, weekday coverage only) of Wimbledon and did so until 1999.  In 2009, HBO broadcast the inaugural Billie Jean King Cup. 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. Anne Guerrant, also known as Mona Anne Guerrant, was an American professional tennis player from 1971–1980.  She ranked as high as #11 in the world in singles in 1976 and was the winner of four singles titles in Portland, South Florida, and in Wellington and Auckland, New Zealand.  She won many doubles titles on the pro tour with several different partners including Ann Kiyomura and Kerry Reid with whom she won the Australian Open doubles title in 1977.  She was a women's doubles and mixed doubles standout in World Team Tennis and was part of the #1 women's doubles team in the League with Billie Jean King in 1975 and the #1 mixed doubles team with Ross Case in 1978.  Anne retired from the pro tour in 1980, and since then she has also won one world and fourteen age group National Singles Championships as of 2016.  She is a retired real estate entrepreneur, a philanthropist, and author of "How to Be Richer Than Your Parents," a book about finances for high schoolers and young adults. The Women's Tennis Association (WTA), founded in 1973 by Billie Jean King, is the principal organizing body of women's professional tennis.  It governs the WTA Tour which is the worldwide professional tennis tour for women.  Its counterpart organization in the men's professional game is the Association of Tennis Professionals (ATP). Gladys Medalie Heldman (May 13, 1922 – June 22, 2003) was the founder of World Tennis Magazine; she supported Billie Jean King and eight other female tennis players: Rosie Casals, Judy Dalton, Julie Heldman, Kerry Melville, Peaches Barthowicz, Kristy Pigeon, Nancy Richey, and Valerie Ziegenfus.  They were called the Houston Nine and formed the Virginia Slims Tour in the early 1970s (the precursor of today's WTA Tour).  She is a member of the International Tennis Hall of Fame and the International Jewish Sports Hall of Fame.
Answer: yes