Belus Prajoux| .jpg) | 
| Full name | Belus Prajoux Nadjar | 
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| Country (sports) |  Chile | 
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| Residence | Santiago, Chile | 
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| Born | (1955-02-27) 27 February 1955 Santiago, Chile
 | 
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| Height | 1.70 m (5 ft 7 in) | 
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| Turned pro | 1972 | 
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| Retired | 1986 | 
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| Plays | Right-handed (one-handed backhand) | 
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| Career record | 81–128 | 
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| Career titles | 0 | 
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| Highest ranking | No. 66 (12 December 1976) | 
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| French Open | 3R (1975, 1976, 1980) | 
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| Wimbledon | 1R (1977, 1978, 1980) | 
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| US Open | 1R (1973, 1974, 1975, 1976, 1977) | 
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| Career record | 168–131 | 
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| Career titles | 6 | 
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| Highest ranking | No. 17 (19 July 1982) | 
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| French Open | F (1982) | 
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| Wimbledon | 3R (1980) | 
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| US Open | QF (1975) | 
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| Davis Cup | F (1976) | 
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Belus Prajoux Nadjar (born 27 February 1955) is a retired professional tennis player from Chile.
Prajoux won six doubles titles on the ATP Tour during his career. He reached a highest doubles ranking of No. 17 in July 1982. He was a member of the Chile Davis Cup team, and played on the team that reached the final of the 1976 Davis Cup.  Prajoux retired from the tour in 1986.
Grand Slam finals
Doubles (1 loss)
ATP career finals
Doubles (6 wins, 12 losses)
| Legend | 
| Grand Slam (0) | 
| Tennis Masters Cup (0) | 
| ATP Masters Series (0) | 
| ATP Tour (6) | 
| Result | No. | Date | Tournament | Surface | Partner | Opponents | Score | 
| Win | 1. | Jul 1976 | Hilversum, Netherlands | Clay |  Ricardo Cano |  Wojciech Fibak 
  Balázs Taróczy | 6–4, 6–3 | 
| Loss | 1. | Nov 1976 | São Paulo,, Brazil | Carpet |  Ricardo Cano |  Lito Álvarez 
  Víctor Pecci | 4–6, 6–3, 3–6 | 
| Loss | 2. | Nov 1976 | Buenos Aires, Argentina | Carpet |  Ricardo Cano |  Carlos Kirmayr 
  Lito Álvarez | 4–6, 5–7 | 
| Loss | 3. | Dec 1976 | Santiago, Chile | Clay |  Lito Álvarez |  Patricio Cornejo 
  Hans Gildemeister | 3–6, 6–7 | 
| Win | 2. | Nov 1977 | Bogotá, Colombia | Clay |  Hans Gildemeister | .svg.png) Jorge Andrew 
 .svg.png) Carlos Kirmayr | 6–4, 6–2 | 
| Win | 3. | May 1978 | Rome, Italy | Clay |  Víctor Pecci |  Jan Kodeš 
  Tomáš Šmíd | 6–7, 7–6, 6–1 | 
| Loss | 4. | Jun 1978 | Birmingham, UK | Grass |  José Luis Clerc |  Dick Stockton 
  Erik Van Dillen | 6–4, 1–6, 6–3, 6–8, 3–6 | 
| Loss | 5. | Jul 1978 | Stuttgart, West Germany | Clay | .svg.png) Carlos Kirmayr |  Jan Kodeš 
  Tomáš Šmíd | 3–6, 6–7 | 
| Loss | 6. | Nov 1978 | Buenos Aires, Argentina | Clay |  José Luis Clerc |  Chris Lewis 
  Van Winitsky | 4–6, 6–3, 0–6 | 
| Loss | 7. | Nov 1980 | Quito, Ecuador | Clay |  José Luis Clerc |  Andrés Gómez 
  Hans Gildemeister | 3–6, 6–1, 4–6 | 
| Win | 4. | Nov 1980 | Santiago, Chile | Clay |  Ricardo Ycaza | .svg.png) Carlos Kirmayr 
 .svg.png) João Soares | 4–6, 7–6, 6–4 | 
| Win | 5. | Sep 1981 | Bordeaux, France | Clay |  Andrés Gómez |  Jim Gurfein 
  Anders Järryd | 7–5, 6–3 | 
| Loss | 8. | Sep 1981 | Palermo, Italy | Clay |  Jaime Fillol |  José Luis Damiani 
  Diego Pérez | 1–6, 4–6 | 
| Loss | 9. | Nov 1981 | Santiago, Chile | Clay |  Ricardo Cano |  Hans Gildemeister 
  Andrés Gómez | 2–6, 6–7 | 
| Loss | 10. | May 1982 | French Open, France | Clay |  Hans Gildemeister |  Sherwood Stewart 
  Ferdi Taygan | 5–7, 3–6. 1–1 ret. | 
| Win | 6. | Feb 1983 | Viña del Mar, Chile | Clay |  Hans Gildemeister | .svg.png) Júlio Góes 
 .svg.png) Ney Keller | 6–3, 6–1 | 
| Loss | 11. | Mar 1983 | Nancy, France | Clay |  Ricardo Acuña |  Jan Gunnarsson 
  Anders Järryd | 5–7, 3–6 | 
| Loss | 12. | Jul 1983 | Boston, United States | Clay |  Hans Gildemeister |  Mark Dickson 
  Cássio Motta | 5–7, 3–6 | 
External links