Guilherme Barbieri Renner
- Paese
- Brasile
- Data di nascita
- 2008-08-06
- Stagione 2026
- 19–16; doppio 0–1
Ultime partite
| Data | Torneo | Turno | Avversario | Punteggio | Risultato |
|---|---|---|---|---|---|
| 2026-09-28 | Santiago | R1 | Javier Chocano Pezoa | 6-0 6-2 | vinto |
| 2026-09-28 | Santiago | R2 | Emilio Camacho | 6-7 3-6 | perso |
| 2026-09-21 | Curitiba | R32 | Kaue Noatto | 7-5 6-2 | vinto |
| 2026-09-21 | Curitiba | R16 | Giovanni Branchetti | 6-7(4) 5-7 | perso |
| 2026-08-10 | Porto Alegre | R1 | Bernardo Sardao E Saloca | 6-1 6-1 | vinto |
| 2026-08-10 | Porto Alegre | R2 | Miguel Ferraz | 6-1 6-0 | vinto |
| 2026-08-10 | Porto Alegre | QF | Pedro Rodrigues Longobardi | 7-6 6-2 | vinto |
| 2026-08-10 | Porto Alegre | SF | Henrique Hoffmann Schafer Henrique Schafer | 6-7 6-3 6-3 | vinto |
| 2026-08-10 | Porto Alegre | F | Lorenzo Sverzut Corsini | 6-1 6-2 | vinto |
| 2026-07-06 | Londrina | R1 | Rafael Gama | 6-3 6-2 | vinto |
| 2026-07-06 | Londrina | R2 | Max Villar | 2-6 2-6 | perso |
| 2026-07-06 | Londrina | R1 | Fernando Cafure / Mateus kREBS (con Jayden Summers) | 5-7 5-7 | perso |
| 2026-06-24 | Pilsen | Q1 | Sin Hang Tam | 6-4 3-6 10-7 | vinto |
| 2026-06-24 | Pilsen | Q2 | Jaromir Peconka | 6-4 6-3 | vinto |
| 2026-06-24 | Pilsen | QF | Mattia Logrippo | 3-6 2-6 | perso |
| 2026-06-15 | Gladbeck | Q1 | Tudor Alexandru Lacraru | 6-0 6-0 | vinto |
| 2026-06-15 | Gladbeck | Q2 | Taiki Takizawa | 1-6 4-6 | perso |
| 2026-06-09 | Bamberg | Q2 | Volodymyr Revenko | 3-6 0-6 | perso |
| 2026-04-06 | Luque | R1 | Leon Achurra Correa | 2-6 4-6 | perso |
| 2026-03-30 | Asuncion | R1 | Ignacio De Armas | 0-6 1-6 | perso |
| 2026-03-16 | Gaspar | R1 | Alejandro Castellanos | 6-3 6-1 | vinto |
| 2026-03-16 | Gaspar | R2 | Matei Todoran | 2-6 4-6 | perso |
| 2026-03-09 | Porto Alegre | Q1 | Filipe Bullamah | 6-3 6-3 | vinto |
| 2026-03-09 | Porto Alegre | Q2 | Joao Cunha Cunha | 1-6 6-4 9-11 | perso |
| 2026-03-02 | Asuncion | Q2 | Max Becerra | 6-2 6-4 | vinto |
| 2026-03-02 | Asuncion | QF | Angel Maffezzoli | 6-7 5-7 | perso |
| 2026-03-02 | Asuncion | R1 | Jack Secord | 1-6 2-6 | perso |
| 2026-02-23 | Santa Cruz (South America Regional Championships) | R1 | Angel Maffezzoli | 7-5 6-3 | vinto |
| 2026-02-23 | Santa Cruz (South America Regional Championships) | R2 | Ignacio De Armas | 3-6 1-6 | perso |
| 2026-02-09 | Lima | R1 | Lucas Yunez | 1-6 2-6 | perso |