Are Raúl Ramírez and Guillermo Vilas both from Mexico?
no
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.
Raúl Ramírez
Raúl Ramírez (born 20 June 1953) is a retired Mexican professional tennis player.
 He was active during the 1970s and 1980s, and is regarded as one of the great all-around players of the modern era.
 Ramírez was also the first player to finish first in both singles and doubles Grand Prix point standings, accomplishing the feat in 1976.
 He attended and played tennis at the University of Southern California in Los Angeles.
1977 Louisville Open
The 1977 Louisville Open, also known as the Louisville International Tennis Classic, was a men's tennis tournament played on outdoor clay courts at the Louisville Tennis Center in Louisville, Kentucky, USA.
 It was the eighth edition of the tournament and was held from 25 July through August 1, 1977.
 The tournament was part of the Grand Prix tennis circuit and categorized as a Four Star event.
 The singles final was won by first-seeded Guillermo Vilas who received $20,000 first prize money.
 It was Vilas' third title win at the tournament after 1974 and 1975. 1975 ATP Buenos Aires – Singles
Guillermo Vilas defeated Adriano Panatta 6-1, 6-4, 6-4 to win the 1975 ATP Buenos Aires singles competition.
 Vilas was the defending champion. Maritza Sayalero
Maritza Sayalero (born February 16, 1961 in Caracas) is a Venezuelan designer, model, businesswoman and beauty queen.
 In 1979 She was crowned both Miss Venezuela and Miss Universe, the first woman from Venezuela to win this title.
 She is married to Mexican tennis player Raúl Ramírez, with whom she has lived in Mexico since 1981.
 For years she had a boutique where she sold items of her own design. Raúl Ramírez (actor)
Raúl Ramírez (Guadalajara 28 January 1927 - Mexico City 22 June 2014) was a veteran Mexican actor. El Bajío (restaurant)
El Bajío is a group of ten restaurants in Mexico City which are run by Carmen Ramírez Degollado, noted for their colorful decoration and traditional cuisine from central Mexico which has received awards and praise from notable food experts.
 The restaurant business began in 1972 when Carmen’s husband Raúl Ramírez Degollado bought a restaurant selling carnitas in the northwestern borough of Azcapotzalco.
 Four years later, Raúl died and Carmen took over the business, expanding the menu and adding waiters.
 The restaurant was so successful that she was able to send her five children to private university.
 In 2006, El Bajío opened a second location in the center of the city and since then has grown to ten locations which serve about 120,000 diners a month.
 Carmen has become a notable chef in her own right, giving classes and demonstrations in Mexico and abroad as well as writing about 20 books. 1977 ATP Buenos Aires (April) – Singles
Guillermo Vilas defeated Wojtek Fibak 6-4, 6-3, 6-0 to win the April 1977 ATP Buenos Aires singles competition.
 Vilas was the defending champion. Penthouse (telenovela)
Penthouse, is a Mexican telenovela directed by Raúl Araiza Sr for Televisa in 1973.
 Starring Fanny Cano and Raúl Ramírez. 1977 ATP Buenos Aires (November) – Singles
Guillermo Vilas defeated Jaime Fillol Sr. 6-2, 7-5, 3-6, 6-3 to win the November 1977 ATP Buenos Aires singles competition.
 Vilas was the defending champion.