Question: Are Sun Tiantian and Gene Mayer both tennis players?

Context paragraphs:
Patricia Tarabini: Patricia Tarabini (born 6 August 1968) is an Argentine former tennis player.  Tarabini represented her country and won the bronze Olympic medal at the 2004 Athens games, with Paola Suárez, where they lost 7–9 in the third set to eventual gold medalists from China, Sun Tiantian and Li Ting.  On May 9, 1988, Patricia reached her highest singles ranking; world number 29.  Tarabini's highest doubles ranking was world number 12, which she achieved on August 17, 1998.  Patricia turned pro in 1986, and won a total of 15 top-level doubles titles in her career.  She is the 1996 French Open mixed doubles champion, which she won with Javier Frana.

1983 ABN World Tennis Tournament: The 1983 ABN World Tennis Tournament was a men's tennis tournament played on indoor carpet courts at the Ahoy Rotterdam in the Netherlands.  It was part of the 1983 Volvo Grand Prix circuit.  It was the 11th edition of the tournament and was held from 14 March through 20 March 1983.  Gene Mayer won the singles title.

Tennis New Zealand: The history of tennis in New Zealand dates back to the 1870s, the decade when the development of modern tennis began.  The first "New Zealand Tennis Championships" were played at Farndon in Hawkes Bay in 1886.  New Zealand Lawn Tennis Association (NZLTA) was formed at a meeting held in Hastings in December 1886.  Shortly after its inauguration, the New Zealand Association became affiliated with the Lawn Tennis Association (England).  In 1904 New Zealand Lawn Tennis Association amalgamated with six Australian state tennis associations to form the Lawn Tennis Association of Australasia.  New Zealand Lawn Tennis Association played a significant role in the origin of the Australian Open.  Lawn Tennis Association of Australasia created the tournament called "The Australasian Mens Championships" (which later became Australian Open) in 1905 and was first played in Warehouseman's Cricket Ground and it was decided that championships would be hosted by both Australian as well as New Zealand venues.  New Zealand hosted the championship twice— Christchurch (1906) and Hastings (1912).  The geographical remoteness of both the countries (Australia and New Zealand) made it difficult for foreign players to enter the tournament.  In Christchurch in 1906, of a small field of 10 players, only two Australians attended, and the tournament was won by a New Zealander (Tony Wilding).  Lawn Tennis Association of Australasia was one of the twelve national associations of tennis which established the International Lawn Tennis Federation (ILTF) in a conference in Paris, France on 1 March 1913.  From 1905 until 1919, New Zealand and Australian tennis players participated in the International Lawn Tennis Challenge (Davis Cup) under the alias of "Team Australasia", the team claimed a title six times (1907, 1908, 1909, 1911, 1914, 1919), however, there were attempts to severance this trans-tasmanian partnership, in order to allow New Zealand players to represent their nation on international tennis events.  In 1922, New Zealand dropped out from this partnership and on 16 March 1923 New Zealand Lawn Tennis Association was granted affiliation to the International Lawn Tennis Association and thereby became eligible to enter the International Lawn Tennis Challenge in its own right.  New Zealand Lawn Tennis Association filed its first challenge with United States Lawn Tennis Association for 1924 International Lawn Tennis Challenge.  Tennis New Zealand was the founding member of Oceania Tennis Federation in 1993.

1982 Bavarian Tennis Championships: The 1982 Bavarian Tennis Championships was a men's Grand Prix tennis circuit tournament held in Munich, West Germany which was played on outdoor clay courts.  It was the 66th edition of the tournament and was held form 17 May through 23 May 1982.  Gene Mayer won the singles title.

Guadalajara Open: The Guadalajara Open is a defunct tennis tournament that was played on the Grand Prix tennis circuit in 1978.  The event was held in Guadalajara, Mexico and was played on outdoor clay courts.  Gene Mayer won the singles title while Sandy Mayer and Sherwood Stewart partnered to win the doubles title.

1980 Jack Kramer Open: The 1980 Jack Kramer Open, also known as the Pacific Southwest Open, was a men's tennis tournament played on outdoor hard courts at the Los Caballeros Tennis Club in Fountain Valley, California in the United States.  The event was part of the Grand Prix tennis circuit.  It was the 52nd edition of the Pacific Southwest tournament and was held from April 14 through April 20, 1980.  First-seeded Gene Mayer won the singles title and the corresponding $27,500 first-prize money.

Gene Mayer: Gene Mayer (born April 11, 1956) is a former tennis player from the United States who won 14 singles titles during his career.

2005 China Open – Women's Singles: Serena Williams was the defending champion, but lost in second round to Sun Tiantian.

2009 Australian Open – Mixed Doubles: Sun Tiantian and Nenad Zimonjić were the defending champions, but Sun chose not to participate, and only Zimonjić competed that year.  Zimonjić partnered with Anna-Lena Grönefeld, but lost in the first round to Cara Black and Leander Paes.

Sun Tiantian: Sun Tiantian (; ; born 12 October 1981) is a Chinese former professional tennis player.

Supporting paragraphs: Sun Tiantian Gene Mayer
Answer: yes