Mahesh Shrinivas Bhupathi (born 7 June 1974) is a retired Indian professional tennis player.
 In 1997, he became the first Indian to win a Grand Slam tournament (with Rika Hiraki).
 With his win at the Australian Open mixed doubles in 2006, he joined the elite group of eight tennis players who have achieved a career Grand Slam in mixed doubles.
 He is also the founder of International Premier Tennis League.
 In December 2016, Bhupathi was appointed as India's next non-playing Davis Cup captain and took over the reins from Anand Amritraj in February 2017.
Rika Hiraki (Japanese: 平木 理化 , born 6 December 1971) is a former professional Japanese female tennis player.
Donald Dell (born June 17, 1938 in Savannah, Georgia, United States) is an attorney and was a professional tennis player, U.S. Davis Cup captain, and administrator.
 Dell was one of the first professional sports agents, having represented professional tennis players Arthur Ashe, Stan Smith, Jimmy Connors, and Ivan Lendl during pro tennis' golden age (1975 to 1985).
 He was also the founder of Professional Services (ProServ), one of the nation's first sports marketing firms established in 1970 with co-founder, Frank Craighill, a fellow law partner.
 His younger brother, Dick, worked for ProServ managing US Open champion Gabriela Sabatini, and played Number One Singles for the University of Michigan.
 He was Big Ten #1 Singles Champion in 1969.
Serena Jameka Williams (born September 26, 1981) is an American professional tennis player.
 The Women's Tennis Association (WTA) has ranked her world No. 1 in singles on eight occasions, from 2002 to 2017.
 She became the world No. 1 for the first time on July 8, 2002.
 On the sixth occasion, she held the ranking for 186 consecutive weeks, tying the record set by Steffi Graf for the most consecutive weeks as world No. 1 by a female tennis player.
 In total, she has been world No. 1 for 319 weeks, which ranks her third in the Open Era among female tennis players.
 Some commentators, players and sports writers regard her as the greatest female tennis player of all time.
The Men's International Professional Tennis Council (MIPTC), also called the Men's Tennis Council (MTC), was a governing body that administered the men's professional Grand Prix tennis circuit.
 It was founded in 1974 and was made up of representatives of the International Tennis Federation (ITF), the Association of Tennis Professionals (ATP) and, from 1976 onwards, tournament directors from around the world.
 Among its main responsibilities were the sanctioning and scheduling of the tournaments that comprise the Grand Prix circuit.
 Additionally it was responsible for creating a code of conduct for tennis players and its subsequent enforcement via the administration of fines and suspensions.
Rod Laver defeated Tony Roche 6–3, 6–4, 6–2 in the final to win the Gentlemen's Singles title at the 1968 Wimbledon Championships.
 It was Laver's third Wimbledon title, and his seventh grand slam overall.
 This was the first year when professional tennis players were allowed to compete at the Wimbledon Championships.
 Previously only amateur tennis players could compete.
Athletic DNA (ADNA) is an American sports apparel company.
 Founded in Seattle in 2007, ADNA began by training young tennis athletes, which evolved into sponsoring Select Junior Tennis players, and then expanded to manufacturing clothing for youth and adult tennis players.
 ADNA has since spread to professional tennis, and currently sponsors players on the ATP Tour & WTA Tour.
The "Challenge of Champions" was created to be one of the richest prize money tennis events in the world.
 Created by Leo E. Fenn III in 1985 as an Invitation Only Tennis Tournament which would feature daily matches which were the equivalent to the Finals of the US Open or Wimbledon.
 It was usually held before the Masters and invited only the top eight men's tennis players in the world according to their rankings on the ATP poll.
 In 1985, creator & founder 24-year-old Leo E. Fenn III partnered with 28-year-old Mark Myden to form a company called Special Events Productions.
 SEP produced the "Challenge of Champions" Tournament which became a major player in professional tennis.
 These two entrepreneurs became the youngest producers in history of professional tennis.
 Leo & Mark acquired major fortune 500 corporate sponsors such as AT&T, VISA, Cadillac, Fila Sportswear, DeBeers Diamonds as well as negotiated two days of live weekend television coverage on NBC.
 Their title sponsorship package sold to AT&T was the largest single vent sponsorship package in professional tennis that year.
 Leo negotiated with the brand new Thomas Mack Center Arena in Las Vegas to host the inaugural event.
 The event rights were eventually sold to Pro Serve and concluded following the 1989 Challenge.
Fiorella Bonicelli (born 21 December 1951) is a retired professional tennis player from Uruguay.
 During her career, she won the 1975 French Open mixed doubles title with Thomaz Koch.
 She also won the 1976 French Open women's doubles title with Gail Lovera, defeating Kathleen Harter and Helga Niessen Masthoff 6–4, 1–6, 6–3.
 At the Fed Cup, her singles record is 11–4, and doubles record 6–8.
 During her career, she reached one Grand Slam singles quarterfinal, at the 1978 French Open, where she lost to Virginia Ruzici 6–7, 6–4, 6–8.
The Virginia Slims Circuit was a tennis tour consisting of a group of originally nine female professional players.
 Formed in 1970, the Virginia Slims Circuit eventually became the basis for the later named WTA Tour.
 The players, dubbed the "Original 9", rebelled against the United States Lawn Tennis Association (USLTA) due to the wide inequality between the amount of prize money paid to male tennis players and to female tennis players.

Question: Are Rika Hiraki and Fiorella Bonicelli both professional tennis players?
Answer: yes