Donald James "Don" Johnson (born September 9, 1968) is a former professional tennis player from the United States who reached the World No. 1 doubles ranking in 2002.
 Although born in Bethlehem, Pennsylvania, he was raised and learned the sport of tennis in the Pittsburgh suburb of Mt. Lebanon, Pennsylvania.
 Johnson attended Fairview High School in Erie, Pennsylvania, and won the PIAA State Singles Championship in 1984.
 During his career, he won the Wimbledon men's doubles title in 2001 (partnering Jared Palmer), and the Wimbledon mixed doubles title in 2000 (partnering Kimberly Po).
 He also won the doubles title at the Tennis Masters Cup in 2000 (partnering Piet Norval).
 He won a total of 23 top-level doubles titles.
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.
Jared Eiseley Palmer (born July 2, 1971) is a professional tennis player who won 28 professional doubles titles and one singles title in his career on the ATP Tour.
 He also won four double titles on the challenger's circuit (two in 1992 and two in 1993).
 Palmer turned professional in 1991 after winning the 1991 NCAA Division 1 singles title as a sophomore playing for Stanford University.
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.
Jared Donaldson (born October 9, 1996) is an American professional tennis player from Glocester, Rhode Island.
 Jared is a "Next Generation" star on the ATP World Tour of Tennis as he is among a handful of top under-21-years-of-age professional tennis players in the world.
 He has won an ATP Challenger title in each of singles and doubles.
Eugenia Aleksandrovna Maniokova (Russian: Евгения Александровна Манюкова ; born 17 May 1968) is a retired professional tennis player from the Russian Federation.
 She is a former World No. 18 in doubles.
Manuela Maleeva-Fragniere and Leila Meskhi were the defending champions.
 Maleeva-Fragniere retired from tennis earlier that year, but only Meskhi competed that year with Eugenia Maniokova.
The 2001 Canada Masters – Doubles was the men's doubles event of the one hundred and twelfth edition of the Canada Masters; a WTA Tier I tournament and the most prestigious men's tennis tournament held in Canada.
 Sébastien Lareau and Daniel Nestor were the defending champions but they competed with different partners that year, Lareau with Justin Gimelstob and Nestor with Sandon Stolle.
 Gimelstob and Lareau lost in the first round to Mark Knowles and Brian MacPhie, as did Nestor and Stolle to Jan-Michael Gambill and Simon Larose.
 Jiří Novák and David Rikl won in the final 6–4, 3–6, 6–3 against Donald Johnson and Jared Palmer.
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.
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.

Question: Are Eugenia Maniokova and Jared Palmer both professional tennis players?
Answer: yes