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Guillermo Rivera
2008 Stats
| by CoreTennis | Wins | Losses | PCT | 6-0 | Tiebreakers Won | Tiebreakers Lost |
| Pro Record * | 6 | 10 | 0.375 | 1 | 3 | 4 |
* Sum of ATP Tour, Challenger and ITF events for men, WTA Tour and ITF events for women.
Tournaments Played
 | Nov 03 | Fut. | 1/16 | Chile F5 Futures, Santiago |
| Oct 06 | Fut. | 1/8 | Chile F1 Futures, Antofagasta |
| Sep 29 | Fut. | [Q] | Ecuador F6 Futures, Quito |
| Sep 29 | Fut. | 1/8 | Ecuador F6 Futures, Quito |
| Sep 22 | Fut. | [Q] | Bolivia F3 Futures, La Paz |
| Sep 22 | Fut. | 1/8 | Bolivia F3 Futures, La Paz |
| Sep 15 | Fut. | [Q] | Bolivia F2 Futures, Cochabamba |
| Sep 15 | Fut. | QF | Bolivia F2 Futures, Cochabamba |
| Sep 01 | Fut. | [Q] | Poland F7 Futures, Wroclaw |
| Sep 01 | Fut. | 1/16 | Poland F7 Futures, Wroclaw |
| Aug 25 | Fut. | [Q] | Poland F6 Futures, Poznan |
| Aug 25 | Fut. | 1/16 | Poland F6 Futures, Poznan |
| Aug 18 | Fut. | [Q] | Poland F5 Futures, Olsztyn |
| Aug 18 | Fut. | 1/16 | Poland F5 Futures, Olsztyn |
| Jul 21 | Fut. | [Q] | Spain F28 Futures, Denia |
| Jul 14 | Fut. | [Q] | Spain F27 Futures, Gandia |
| Jul 07 | Fut. | [Q] | Spain F26 Futures, Elche |
| Apr 14 | Fut. | [Q] | USA F8 Futures, Little Rock, AR |
| Apr 14 | Fut. | 1/8 | USA F8 Futures, Little Rock, AR |
| Apr 07 | Fut. | [Q] | USA F7 Futures, Mobile, AL |
| Feb 25 | Chall. | 1/16 | Santiago Challenger, Santiago |
| Jan 28 | Int. Srs | [Q] | Movistar Open, Vina del Mar |
| Dec 10 | B18 | 1/8 | Yucatan World Cup, Merida |
| Dec 03 | B18 | 1/16 | Orange Bowl Tennis Championships, Key Biscayne, FL |
| Nov 12 | Fut. | 1/16 | Chile F5 Futures, Santiago |
| Nov 06 | Fut. | 1/16 | Chile F4 Futures, Santiago |
| Oct 29 | Fut. | [Q] | Chile F3 Futures, Santiago |
| Oct 22 | Fut. | [Q] | Chile F2 Futures, Osorno |
| Oct 15 | Fut. | [Q] | Chile F1 Futures, Antofagasta |
| Sep 14 | B18 | 1/16 | Kentucky International Junior Tennis Derby, Lexington, KY |
| Sep 02 | B18 | 1/32 | US Open, New York, NY |
| Aug 27 | B18 | Finals | Canadian Open Junior Championships, Montreal |
| Jun 30 | B18 | 1/32 | Wimbledon, Wimbledon |
| Jun 24 | B18 | 1/8 | ITF Juniors - Roehampton, Roehampton |
| Jun 04 | B18 | 1/32 | French Open / Roland Garros, Paris |
| May 28 | B18 | 1/16 | Astrid Bowl, Loverval |
| May 21 | B18 | 1/16 | Trofeo Bonfiglio, Milano |
| May 14 | B18 | 1/32 | International Junior Tournament "Citta' Di Santa Croce", Santa Croce Sull'Arno |
| Mar 19 | B18 | 1/16 | Copa Gerdau, Porto Alegre |
| Mar 12 | B18 | QF | Banana Bowl, San Paulo |
| Mar 05 | B18 | 1/8 | Asuncion Bowl, Asuncion |
| Feb 12 | B18 | Finals | Copa Milo, Santiago |
| Jan 29 | B18 | Finals | Torneo Internacional Inka Bowl, La Molina Lima |
| Jan 22 | B18 | Winner | Nicolas Machivello Copa Graiman, Guayaquil |
| Jan 15 | B18 | SF | Barranquilla Junior Tennis Tournament, Barranquilla |
| Jan 08 | B18 | SF | Copa Gatorade, Caracas |
| Dec 04 | B18 | 1/32 | Orange Bowl Tennis Championships, Key Biscayne, FL |
| Nov 28 | B18 | 1/32 | Eddie Herr International Junior Tennis Championships, Bradenton, FL |
| Nov 06 | Fut. | | Chile F3 Futures, Santiago |
| Oct 30 | Fut. | | Chile F2 Futures, Talca |
| Oct 23 | Fut. | | Chile F1 Futures, Santiago |
| Sep 25 | B18 | Winner | Torneo Internacional Junior UC, Santiago |
| Sep 18 | B18 | Winner | Vina Junior Open, Vina Del Mar |
| Sep 11 | B18 | | Kentucky International Junior Tennis Derby, Lexington, KY |
| Sep 01 | B18 | [Q] | US Open, New York, NY |
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