Portugal
15.04.99, 25 years
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Portugal
29.04.99, 25 years
INFO: click on player name to show detailed player statistics
Guilherme Sergio vs. Duarte Nuno Teixeira - head to head matches
Guilherme Sergio form & Duarte Nuno Teixeira form
Guilherme Sergio - last matches
 Portugal F7 - Clay |
| 17.04.17 q 1 | vs. Diogo Lourenco | 6-4, 6-3 |  | match details |
| 17.04.17 q 2 | vs. Miguel Semedo | 6-4, 6-1 | | match details |
| 17.04.17 qual. | vs. Daniel Rodrigues | 6-72, 2-6 |  | match details |
| Portugal F5 - Clay |
| 03.04.17 q 1 | vs. Flemming Peters | 4-6, 2-6 | | match details |
| Portugal F4 - Hard |
| 27.03.17 q 1 | vs. Duarte Nuno Teixeira | 6-1, 6-0 | | match details |
| 27.03.17 q 2 | vs. Billy Harris | 2-6, 2-6 | | match details |
| Portugal F3 - Hard |
| 13.03.17 | vs. Goncalo Ferreira | 6-3, 6-3 | | match details |
| 13.03.17 q 1 | vs. Juan Pablo Canas Garcia | 3-6, 6-2, 2-0, Juan Pablo Canas Garcia - retired | | match details |
| 13.03.17 q 2 | vs. Bart Van Den Berg | 3-6, 7-5, 2-6 | | match details |
| Portugal F2 - Hard |
| 06.03.17 | vs. Jorge Hernando-Ruano | 7-5, 1-6, 2-6 | | match details |
| Portugal F1 - Hard |
| 27.02.17 | vs. Pietro Licciardi | 2-6, 3-6 | | match details |
| Portugal F8 - Hard |
| 11.07.16 q 2 | vs. Joao Monteiro | 0-6, 3-6 | | match details |
| 11.07.16 q 1 | vs. Afonso Cortez | 6-2, 6-2 | | match details |
| Portugal F7 - Hard |
| 23.05.16 q 2 | vs. Catalin-Ionut Gard | 1-6, 1-6 | | match details |
| 23.05.16 q 1 | vs. Joao Antonio | 6-3, 1-6, 6-2 | | match details |
| Portugal F6 - Hard |
| 16.05.16 q 2 | vs. Juan Pablo Canas Garcia | 1-6, 3-6 | | match details |
| 16.05.16 q 1 | vs. Alan Gleeson | Alan Gleeson - walk over | | match details |
| Portugal F5 - Hard |
| 09.05.16 q 1 | vs. Pedro Barosa | 6-2, 3-6, 6-2 | | match details |
| 09.05.16 q 2 | vs. Marcus Walters | 2-6, 3-4, - Guilherme Sergio - retired | | match details |
| Portugal F4 - Clay |
| 02.05.16 q 1 | vs. Joao Faria Carvalho | 5-7, 2-6 | | match details |
| Portugal F3 - Hard |
| 07.03.16 | vs. Alejandro Artunedo | 2-6, 0-6 | | match details |
| Portugal F13 - Clay |
| 05.10.15 q 1 | vs. Manuel Almeida | 3-6, 5-7 | | match details |
| Portugal F7 - Hard |
| 25.05.15 q 2 | vs. Alejandro Ortega Palacios | 1-6, 5-7 | | match details |
| 25.05.15 q 1 | vs. Mikhail Zaytsev | 6-1, 6-0 | | match details |
| Portugal F6 - Hard |
| 18.05.15 q 1 | vs. Afonso Fazendeiro | 4-6, 6-2, 2-6 | | match details |
| Portugal F4 - Clay |
| 04.05.15 q 1 | vs. Domingos Sousa Coutinho | 6-4, 6-2 | | match details |
| 04.05.15 q 2 | vs. Manuel Almeida | 0-6, 4-6 | | match details |
Duarte Nuno Teixeira - last matches
| Portugal F8 - Clay |
| 14.04.18 q 1 | vs. Marco Wright | 4-6, 2-6 | | match details |
| Portugal F7 - Clay |
| 09.04.18 q 2 | vs. Miliaan Niesten | 3-6, 3-6 | | match details |
| 07.04.18 q 1 | vs. Laelson Rodrigues | 7-63, 6-2 | | match details |
| Portugal F6 - Hard |
| 26.03.18 qual. | vs. Adrien Bossel | 1-6, 3-6 | | match details |
| 25.03.18 q 2 | vs. Albert Roglan | 1-0, Albert Roglan - retired | | match details |
| Portugal F5 - Hard |
| 19.03.18 q 2 | vs. Pedro Gabriel Rodrigues | 0-6, 2-6 | | match details |
| Portugal F2 - Hard |
| 24.02.18 | vs. Bart Van Den Berg | 1-6, 0-6 | | match details |
| Portugal F21 - Hard |
| 02.10.17 q 2 | vs. Aleksei Nerushenko | 6-71, 1-6 | | match details |
| Portugal F20 - Hard |
| 25.09.17 q 1 | vs. Nathan Lavanchy | 5-7, 2-6 | | match details |
| Portugal F19 - Hard |
| 18.09.17 q 1 | vs. Tomas Almeida | 2-6, 1-6 | | match details |
| Portugal F17 - Hard |
| 21.08.17 q 1 | vs. Richard Yang | 3-6, 0-6 | | match details |
| Portugal F13 - Hard |
| 24.07.17 q 2 | vs. Davide Albertoni | 1-6, 1-6 | | match details |
| Portugal F12 - Hard |
| 17.07.17 q 1 | vs. Felipe Muzzi | 3-6, 6-73 | | match details |
| Portugal F11 - Hard |
| 10.07.17 q 1 | vs. Scott Duncan | 1-6, 0-6 | | match details |
| Portugal F4 - Hard |
| 27.03.17 q 1 | vs. Guilherme Sergio | 1-6, 0-6 | | match details |
| Portugal F3 - Hard |
| 13.03.17 | vs. Martin Valdo Randpere | 3-6, 5-7 | | match details |
| Portugal F12 - Clay |
| 03.10.16 q 1 | vs. Francisco Rocha | 2-6, 7-5, 4-6 | | match details |
| Portugal F11 - Hard |
| 26.09.16 q 1 | vs. Rafn Kumar Bonifacius | 3-6, 3-6 | | match details |
| Portugal F4 - Clay |
| 02.05.16 q 1 | vs. Manuel Almeida | 6-4, 5-7, 4-6 | | match details |
| Portugal F13 - Clay |
| 05.10.15 q 1 | vs. Jose-Ricardo Nunes | 2-6, 3-6 | | match details |
| Portugal F7 - Hard |
| 25.05.15 q 1 | vs. Maxence Barbosa | 0-6, 6-74 | | match details |
| Portugal F5 - Hard |
| 11.05.15 q 1 | vs. Miguel Semedo | 4-6, 2-6 | | match details |
| Portugal F4 - Clay |
| 04.05.15 q 1 | vs. Manuel Almeida | 2-6, 0-6 | | match details |
