Question: Are Marc Rosset and Guillermo Vilas both tennis players?

full_context: Document 1: 1977 Grand Prix (tennis): The 1977 Colgate-Palmolive Grand Prix was a professional tennis circuit administered by the International Lawn Tennis Federation (ILTF, later the ITF) which served as a forerunner to the current Association of Tennis Professionals (ATP) World Tour and the Women's Tennis Association (WTA) Tour. The circuit consisted of the four modern Grand Slam tournaments and open tournaments recognised by the ILTF. The Colgate-Palmolive Masters is included in this calendar but did not count towards the Grand Prix ranking. Colgate-Palmolive was the new tour sponsor, taking over from Commercial Union. Guillermo Vilas won the Grand Prix circuit, having accumulated the most points (2,047), and received the largest share from the bonus pool ($300,000). The top eight points ranked singles players as well as the top four doubles teams qualified for the season-ending Masters tournament
Document 2: László Markovits: Count László Markovits de Spizza et Kisterpest (born 4 April 1970) is a former tennis player from Hungary, son of water polo player and national team captain Kálmán Markovits and World champion handballer Márta Balogh. He was the winner of Hungarian National Tennis Championships in singles in 1986 (the youngest winner in seniors category in Hungarian tennis history with his age of 16) and has won it two times. He represented his native country as a lucky loser at the 1992 Barcelona Olympics in Barcelona in singles and partnered with Sándor Noszály for the doubles, but both ended in the first round, losing in four sets and being forced to retire respectively. He reached the second round in the 1988 Seoul Olympics and 1996 Atlanta Olympics teamed up with Gábor Köves. In the 1991 Davis Cup Euro/African Group I 1st Round Play-offs he defended Hungary to be relegated to Group II by winning the second and third match (singles and doubles) against Morocco resulting in the irreversible 3–0 lead (5–0 in total). He was a member as a reserve of the 1993 team, whose victory over Argentina resulted in advancing to the World Group and an active member of the 1995 team who shocked Australia by knocking them out in the World Group play-offs. He was a recurring member of the team over a decade (1987–97) clinching a 9–8 win-loss record in doubles but being less successful in singles (1–7 in overall). He has later become the chairman of Vasas SC.
Document 3: Guillermo Vilas: Guillermo Vilas (] ; born 17 August 1952) is a retired professional tennis player from Argentina, N°1 of the Grand Prix tennis circuit's Season in 1974, 1975 and 1977, who won four majors, seven Grand Prix Super Series titles and 62 ATP titles. He was inducted into the International Tennis Hall of Fame in 1991. Known for his prolific match play, especially on clay, he became the second man to win more than 900 matches in the Open Era, and his number of match wins on clay are by far the most of the Era. His peak was the 1977 season during which he won two major titles (both on clay), had two long match win streaks of 46 all-surface and 53 on clay, and finished with an Open Era record of match wins. In 2005, Tennis magazine ranked him as the 15th-best male player of the preceding 40 years. He also popularized the between-the-legs tweener shot, also known as the "Gran Willy" in his honor.
Document 4: 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 5: Robert Seguso: Robert Arthur Seguso (born May 1, 1963) is a former professional tennis player from the United States. A doubles specialist, he won four Grand Slam men's doubles titles (two Wimbledon, one French Open and one US Open). He also won the men's doubles Gold Medal at the 1988 Olympic Games in Seoul, partnering Ken Flach. Seguso reached the World No. 1 doubles ranking in 1985. He won a total of 29 career doubles titles between 1984 and 1991.
Document 6: Gonzales–Rosewall rivalry: American tennis player Pancho Gonzales had a long-running rivalry with Australian Ken Rosewall. Gonzales is still sometimes considered to be a candidate for the greatest tennis player of all time; he was the dominant player of the 1950s and still holds the men's all-time record of being ranked world No. 1 for eight years. Rosewall became the world's best player upon Gonzales's semi-retirement in 1961 and held that position either by himself or sharing it with others for six years. Rosewall was signed in 1956 by the promoter Jack Kramer, a former #1 player himself, to join his small band of touring professionals in 1957. He then engaged in a round-the-world, head-to-head tour against Gonzales, the defending world's champion, over the next five months, winning 26 matches but losing 50. In his 1979 autobiography Kramer included both Gonzales and Rosewall in his list of the 21 greatest players of all time. Kramer, however, initially "panicked" upon signing Rosewall.He was a cute little fellow with a dink serve, who operated mostly from the baseline. That great volley of his hadn't been developed yet. I was afraid that Gorgo would eat him alive and put us out of business the rest of the way. But like a lot of people I completely underestimated Rosewall. Before their opening match in Melbourne, Kramer went to Gonzales and asked him to "carry" Rosewall, giving him a better share of the gate to gain his assent. Gonzales did try to carry out his part of the deal for a few matches, but then called it off, telling Kramer that he was no longer able to play his normal game. Kramer agreed. "It was... obvious that Rosewall was not the pushover I had feared. (In fact, Gonzales only beat him 50–26, and it was always competitive.)" Six years older than Rosewall, 13 years later, in 1970, Gonzales defeated him in 6–4, 6–4, in the 199th and next-to-last match they ever played—Gonzales was 42 years old at the time and Rosewall was considered to be the co-No. 1 player in the world.
Document 7: Martina Hingis: Martina Hingis (born 30 September 1980) is a Swiss professional tennis player, a former world No. 1 singles player and currently ranked world No. 2 in doubles by the WTA. She has spent a total of 209 weeks as the singles No. 1 and has won five Grand Slam singles titles, thirteen Grand Slam women's doubles titles, winning a calendar-year doubles Grand Slam in 1998, and seven Grand Slam mixed doubles titles; for a combined total of twenty-five major titles. In addition, she has won the season-ending WTA Championships two times in singles and three times in doubles, and an Olympic silver medal.
Document 8: 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 9: Boris Becker: Boris Franz Becker (] ; born 22 November 1967) is a German former world No. 1 professional tennis player. He was successful from the start of his career, winning the first of his six major singles titles aged 17. He also won five year-end championships, 13 Masters Series titles, and an Olympic gold medal in doubles. "Tennis" magazine ranked him the 11th best male player of the period 1965–2005.
Document 10: Stefan Edberg: Stefan Bengt Edberg (] ; born 19 January 1966) is a Swedish former world no. 1 professional tennis player (in both singles and doubles). A major proponent of the serve-and-volley style of tennis, he won six Grand Slam singles titles and three Grand Slam men's doubles titles between 1985 and 1996. He also won the Masters Grand Prix and was a part of the Swedish Davis Cup-winning-team four times. In addition he won four Masters Series titles, four Championship Series titles and the unofficial Olympic tournament 1984, was ranked in the singles top 10 for ten successive years, 9 years in the top 5, and is considered one of the greatest players of his era. Edberg began coaching Roger Federer in January 2014, with this partnership ending in December 2015.
Document 11: Guillermo Coria: Guillermo Sebastián Coria (born 13 January 1982), nicknamed El Mago ("The Magician" in Spanish), is a retired professional tennis player from Argentina. He reached a career-high Association of Tennis Professionals (ATP) world No. 3 singles ranking on May 3, 2004. He was named after French Open champion and compatriot Guillermo Vilas.
Document 12: Lorenzo Manta: Lorenzo Manta (born 27 September 1974 in Winterthur) is a former tennis player from Switzerland, who turned professional in 1992. The right-hander reached his highest ATP singles ranking of World No. 103 in June 2000. His best achievement in the grand slam tournaments was reaching the fourth round at Wimbledon in 1999. There, he had a big upset win over the 1996 Wimbledon champion, Richard Krajicek, in the third round in five sets. Manta was then defeated by Brazil's Gustavo Kuerten in the fourth round. He was 4-0 in Davis Cup doubles matches with Roger Federer.
Document 13: Guillermo Cañas: Guillermo Ignacio Cañas (born November 25, 1977), often referred to as Willy Cañas, is a retired Argentine professional tennis player. He was born in Argentina's capital, Buenos Aires, and named after Argentine tennis star Guillermo Vilas. His career-high singles ranking was World No. 8, achieved in June 2005. Cañas was the coach of Ernests Gulbis from July 2011 until May 2012 and became the coach of Teymuraz Gabashvili in 2015. Since January 2017, he is coaching former #1, Jelena Jankovic.
Document 14: Marc Rosset: Marc Rosset (born 7 November 1970) is a former professional tennis player from Switzerland who is best remembered for winning the men's singles gold medal at the 1992 Olympic Games. He also won one Grand Slam doubles title at the French Open in 1992 partnering compatriot Jakob Hlasek.
Document 15: Roger Federer junior years: Swiss tennis player Roger Federer's main accomplishments as a junior player came at Wimbledon, where, in 1998, he won both the singles tournament over Irakli Labadze, in straight sets, and the doubles with Olivier Rochus, over the team of Michaël Llodra and Andy Ram, also in straight sets. In addition, Federer was a runner-up at the US Open Junior tournament in 1998, losing the final to David Nalbandian. Federer would go on to win four other junior singles tournaments in his career.
ground_truth: yes