Question: Which former tennis player is Australian, Geoff Masters or Eugenia Maniokova?

full_context: Document 1: Elena Likhovtseva: 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.
Document 2: Ken Rosewall: Kenneth Robert Rosewall {'1': ", '2': ", '3': 'AM, MBE', '4': "} (born 2 November 1934) is a former world top-ranking amateur and professional tennis player from Australia. He won a record 23 tennis Majors including 8 Grand Slam singles titles and before the Open Era a record 15 Pro Slam titles and a record 35 Major finals overall. He won the Pro Grand Slam in 1963. Rosewall won 9 slams in doubles with a career double grand slam. He is considered to be one of the greatest tennis players of all time. He had a renowned backhand and enjoyed a long career at the highest levels from the early 1950s to the early 1970s. Rosewall was one of the two best male players for about nine years and was the World No. 1 player for a number of years in the early 1960s. He was ranked among the top 20 players, amateur or professional, every year from 1952 through 1977. Rosewall is the only player to have simultaneously held Pro Grand Slam titles on three different surfaces (1962–1963). At the 1971 Australian Open he became the first male player during the open era to win a Grand Slam tournament without dropping a set.
Document 3: Mats Wilander: Mats Wilander (] ; born 22 August 1964) is a former World No. 1 tennis player from Sweden. From 1982 to 1988, he won seven Grand Slam singles titles (three at the French Open, three at the Australian Open, and one at the US Open), and one Grand Slam men's doubles title (at Wimbledon).
Document 4: Marty Riessen: Marty Riessen (born December 4, 1941) played amateur and professional tennis in the 1960s and 1970s. He was ranked as high as No. 11 in the world in singles on the ATP Rankings in September 1974, though was ranked as high as World No. 8 by Lance Tingay of The Daily Telegraph in 1971, before the computer rankings. Renowned for his doubles play, Riessen was also a regular doubles partner of Australian tennis great Margaret Court, winning six of his seven major mixed titles and a career grand slam alongside her. Additionally a winner of two men's doubles grand slams, his highest doubles ranking was No. 3 on March 3, 1980.
Document 5: 1970 Australian Open – Men's Doubles: Bob Lutz and Stan Smith defeated John Alexander and Phil Dent 6–3, 8–6, 6–3 in the final to win the Men's Doubles title at the 1970 Australian Open.
Document 6: Manuela Maleeva: Manuela Georgieva Maleeva-Fragnière (Bulgarian: Мануела Георгиева Малеева ) (born 14 February 1967) is a Bulgarian former professional tennis player. She played on the Women's Tennis Association tour between 1982 and 1994. Through her marriage Maleeva began representing Switzerland officially from January 1990 until her retirement in February 1994.
Document 7: Evgeny Korolev: Evgeny Evgenyevich Korolev (Russian: Евге́ний Евге́ньевич Королёв ; born 14 February 1988) is Kazakhstani tennis player and the cousin of former Russian player Anna Kournikova. He began playing tennis at age four with his father, and picked up his first ATP points at age 15 in three German challenger events. He can speak Russian, German, English and Spanish.
Document 8: Anna Kournikova: Anna Sergeyevna Kournikova (Russian: А́нна Серге́евна Ку́рникова ; ] ; born 7 June 1981) is a Russian former professional tennis player. Her appearance and celebrity status made her one of the best known tennis stars worldwide. At the peak of her fame, fans looking for images of Kournikova made her name one of the most common search strings on Google Search.
Document 9: Roger Taylor (tennis): Roger Taylor MBE (born 14 October 1941) is a British former tennis player. Born in Sheffield, South Yorkshire, he won 6 singles titles and 10 doubles titles during his career. He achieved success at several Grand Slam tournaments, reaching the quarter-finals of the French Open in 1973, the semi-finals of Wimbledon during the same year and winning back to back US Open Men's Doubles titles in 1971 and 1972. He also enjoyed particular success in 1970, again reaching the semi-finals of Wimbledon, where he achieved a big upset win over defending champion Rod Laver en route, and the semi-finals of the Australian Open. Taylor also reached the semi-finals at Wimbledon in 1967. His career-high ATP singles ranking was World No. 11, though Taylor was ranked World No. 8 in 1970 before the ATP rankings began.
Document 10: Vitas Gerulaitis: Vytautas Kevin Gerulaitis (July 26, 1954 – September 17, 1994) was an American professional tennis player. In 1975, Gerulaitis won the men's doubles title at Wimbledon, partnering with Sandy Mayer. He won the men's singles title at one of the two Australian Open tournaments held in 1977 (Gerulaitis won the tournament that was held in December, while Roscoe Tanner won the earlier January tournament). Gerulaitis also won two Italian Open titles, in 1977 and 1979, and the WCT Finals in Dallas, in 1978.
Document 11: Hana Mandlíková: Hana Mandlíková (born 19 February 1962) is a former professional tennis player from Czechoslovakia who later obtained Australian citizenship. During her career, she won four Grand Slam singles titles: the 1980 Australian Open, 1981 French Open, 1985 US Open, and the 1987 Australian Open. She was also the runner-up at four Grand Slam singles events, including the Wimbledon finals of 1981 and 1986, and won one Grand Slam women's doubles title, the 1989 US Open with Martina Navratilova.
Document 12: Geoff Masters: Geoff Masters (born 19 September 1950) is an Australian former tennis player. He was part of doubles winning pairs in the US Open, Australian Open and Wimbledon tournaments during the 1970s.
Document 13: Anastasia Myskina: Anastasiya Andreyevna Myskina (Russian: Анастасия Андреевна Мыскина ; ] ; born 8 July 1981) is a Russian former tennis player. She won the 2004 French Open singles title, becoming the first Russian female tennis player to win a Grand Slam singles title. Subsequent to this victory, she rose to No. 3 in the WTA rankings, becoming the first Russian female tennis player to reach the top 3 in the history of the rankings. In September 2004, she reached a career-high ranking of No. 2. She has not officially retired, but has been inactive on the WTA Tour since May 2007.
Document 14: Eugenia Maniokova: 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.
Document 15: Phil Dent: Philip Clive Dent (born 14 February 1950), is a former professional tennis player. Dent's high water mark as a pro singles player was reaching the Australian Open final in 1974, which he lost to Jimmy Connors in four sets. Dent was also the Men's Doubles champion at the Australian Open in 1975 (with teammate John Alexander), and the Mixed Doubles champion at the US Open in 1976 (with teammate Billie Jean King).
ground_truth: Geoff Masters