Elena Likhovtseva and Jana Novotná were the defending champions, but none of them competed this year.
 Novotná also retired from professional tennis at the end of the 1999 season.
Stanley Roger Smith (born December 14, 1946 in Pasadena, California) is a former world No. 1 American tennis player and two-time Grand Slam singles champion who also, with his partner Bob Lutz, formed one of the most successful doubles teams of all time.
 Together, they won many major titles all over the world.
 In 1970, Smith won the first year end championship Masters Grand Prix title.
 Smith's two major singles titles were the 1971 US Open (over Jan Kodeš in the final), and 1972 Wimbledon (over Ilie Năstase in the final).
 In 1972, he was the year-ending world No. 1 singles player.
 In 1973, he won his second and last year end championship title at the Dallas WCT Finals.
 In addition, he won four Grand Prix Championship Series titles.
 His name is also used in a popular brand of tennis shoes.
 In his early years he improved his tennis game through lessons from Pancho Segura and the Pasadena Tennis Patrons.
Wildcard team Martina Hingis and Mahesh Bhupathi defeated sixth-seeded Elena Likhovtseva and Daniel Nestor 6–3, 6–3 to win the Mixed Doubles title at the 2006 Australian Open tennis tournament.
Elena Alexandrovna Likhovtseva (Russian: Елена Александровна Лиховцева ] ; born 8 September 1975) is a Russian former tennis player.
 She turned professional in January 1992 at the age of 16.
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.
Frank Craighill was one of the founding partners of the sports marketing firm ProServ.
 ProServ was created in 1970 in Washington, D.C. by attorney and former professional tennis player and U.S. Davis Cup captain Donald Dell and Craighill.
 Their first clients were Dell’s Davis Cup teammates Arthur Ashe and Stan Smith.
 At its peak, ProServ represented more than 200 professional athletes and coaches, including Michael Jordan, Patrick Ewing, Stan Smith, Arthur Ashe, and Jimmy Connors.
 The company also managed and promoted professional sporting events and created ProServ Television to handle sports television production and rights representation.
Elena Pampoulova (also Elena Wagner, Elena Pampulova-Bergomi, Bulgarian: Елена Пампулова , born 17 May 1972) is a retired professional tennis player from Bulgaria.
 She competed for Fed Cup of the International Tennis Federation (ITF).
 Elena's first tennis coach was her own mother, Bulgarian tennis player Lubka Radkova.
 Elena's father, Emilian Pampoulov, is also a tennis player.
The 1999 SEAT Open Luxembourg – Doubles was the doubles event of the ninth edition of the most prestigious women's tennis tournament held in Luxembourg.
 Elena Likhovtseva and Ai Sugiyama was the defending champion but she did not compete in this year.
The 1999 Sparkassen Cup – Doubles was the tennis doubles event of the thirteenth edition of the Sparkassen Cup; a WTA Tier II tournament held in Leipzig, Germany.
 Elena Likhovtseva and Ai Sugiyama were the defending champions but were defeated in this year's final by Larisa Neiland and Mary Pierce, 6–1, 6–3.
The Doubles Tournament at the 2005 Qatar Total German Open took place between May 2 and May 8 on the outdoor clay courts of the Rot-Weiss Tennis Club in Berlin, Germany.
 Elena Likhovtseva and Vera Zvonareva won the title, defeating Cara Black and Liezel Huber in the final.

Question: Which professional tennis player is older, Stan Smith or Elena Likhovtseva?
Answer: Stanley Roger Smith (born December 14, 1946 in Pasadena, California)