ATP Tennis - Thiago Monteiro
- Tournament: N/A
- Round: N/A
- Opponent: N/A
- DOB: 1994-05-31
- Birthplace: Brazil, Brazil
- Height: N/A
- Weight: N/A
- Plays: L
- Current World Rank: 90
- Hard: 2-15
- Clay: 23-30
- Grass: 1-2
| Tournament | Date | Sets | Round | Winner | Loser |
|---|---|---|---|---|---|
| US Open | Aug 26, 2019 | 6-3, 6-2, 6-3 | First Round | Bradley Klahn | Thiago Monteiro |
| Winston-Salem Open | Aug 19, 2019 | 5-7, 6-4, 7-6 (9-7) | First Round | Alexei Popyrin | Thiago Monteiro |
| German Open Hamburg | Jul 23, 2019 | 6-1, 6-3 | First Round | Jan-Lennard Struff | Thiago Monteiro |
| Swedish Open | Jul 16, 2019 | 6-3, 2-6, 7-5 | First Round | Elias Ymer | Thiago Monteiro |
| Wimbledon | Jul 2, 2019 | 6-4, 7-6 (7-3), 6-4 | First Round | Kei Nishikori | Thiago Monteiro |
| Roland Garros | May 28, 2019 | 6-3, 6-4, 6-4 | First Round | Dusan Lajovic | Thiago Monteiro |
| Bavarian International Tennis Championships | May 1, 2019 | 6-7 (1-7), 6-4, 6-3 | Second Round | Marton Fucsovics | Thiago Monteiro |
| Bavarian International Tennis Championships | Apr 30, 2019 | 6-1, 6-1 | First Round | Thiago Monteiro | Jan-Lennard Struff |
| Miami Masters | Mar 21, 2019 | 6-4, 6-1 | First Round | Bernard Tomic | Thiago Monteiro |
| Brasil Open | Feb 26, 2019 | 6-3, 6-4 | First Round | Casper Ruud | Thiago Monteiro |
