Marcos Castellanos
2023
| J60Sanpedrosula | [2] | 2R |
| J60Santatecla-4 | [3] | Semi |
| J30Santatecla | [1] | Win |
| J30Guatemala-2 | [1] | Win |
| J60Guatemala-2 | [6] | Semi |
| J60Santatecla-3 | [7] | Semi |
| J60Santatecla-2 | [3] | Semi |
| J100Santodomingo-2 | 1R | |
| J100Santodomingo | [13] | 3R |
| J60Santodomingo-2 | [4] | 3R |
| J60Santodomingo | [4] | 3R |
| J60Guatemala | [4] | 1R |
2022
| J4Guatemala-3 | [4] | Semi |
| J5Santatecla-2 | [1] | Semi |
| Jb3Cancun | [8] | 3R |
| J5Guatemala-2 | [2] | Quarter |
| J4Guatemala-2 | [4] | Quarter |
| J4Santatecla-2 | [7] | Quarter |
| J5Santatecla | [3] | Quarter |
| J4Managua-2 | [5] | Quarter |
| J4Managua | [4] | Semi |
| J5Tegucigalpa-2 | [2] | 2R |
| J5Tegucigalpa | [2] | Quarter |
| J4Llanosdecurundu | [7] | 1R |
| J4Santatecla | 2R | |
| J4Lalibertad | 1R | |
| J5Guatemala | 2R | |
| J4Guatemala | Quarter |
2021
Nation
GUA
Year-end Junior World Ranking
- Year-end 2023 500th
- Year-end 2022 586th
- Year-end 2021 1023th
- Year-end 2020 1681th
- Year-end 2019 2070th
Rival
Boxiong Zhang (0-3)
Juan Carlos Fuentes Vasquez (3-0)
Gustavo Albieri (2-0)
Bullion Sharp (1-1)
Mateus Ranciaro (2-0)
Match Details
2023 J60Sanpedrosula
| W | 1R | Julio Eduardo Gom Rivera | 7-5 6-2 |
| L | 2R | Bullion Sharp | 4-6 3-6 |
2023 J60Santatecla-4
| W | 1R | Barack Carballo | 6-1 6-1 |
| W | 2R | Zavier Augustin | 6-4 7-6 |
| W | QF | Diego Schtulmann | 6-2 6-2 |
| L | SF | Yubel Ubri | 6-3 4-6 2-6 |
2023 J30Santatecla
| W | 1R | Luis Antonio Avila Blanco | 6-0 6-1 |
| W | 2R | Sebastian Steden | 6-0 6-1 |
| W | QF | Jieyi Wang | 6-0 6-2 |
| W | SF | Mario Richmagui | 6-1 6-0 |
| W | F | Juan Carlos Fuentes Vasquez | 6-0 6-1 |
2023 J30Guatemala-2
| W | 1R | Mateus Ranciaro | 6-3 6-2 |
| W | 2R | Bardo Bucknell | 6-4 6-3 |
| W | QF | Lucca Soares Guerra Maio Ribeiro | 6-2 6-1 |
| W | SF | Bullion Sharp | 6-3 6-1 |
| W | F | Gustavo Albieri | 6-4 6-3 |
2023 J60Guatemala-2
| W | 1R | Jacob Lee | 6-1 6-2 |
| W | 2R | Jacob Maravillas | 4-6 6-1 6-2 |
| W | QF | Gustavo Albieri | 6-1 3-6 7-6 |
| L | SF | Abhinav Chunduru | 3-6 5-7 |
2023 J60Santatecla-3
| W | 1R | Alejandro Castellanos | 6-4 6-2 |
| W | 2R | Mateus Ranciaro | 6-1 6-1 |
| W | QF | Holland Snell | 7-6 |
| L | SF | Boxiong Zhang | 3-6 2-6 |
2023 J60Santatecla-2
| W | 1R | Matias Schaeuffler | 6-1 6-0 |
| W | 2R | Matias Link | 6-3 6-4 |
| W | QF | Natan Albertini | 6-1 6-3 |
| L | SF | Boxiong Zhang | 1-6 3-6 |
2023 J100Santodomingo-2
| L | 1R | Dominick Mosejczuk | 6-3 2-6 2-6 |
2023 J100Santodomingo
| W | 2R | Roger Koike | 4-6 6-1 6-2 |
| L | 3R | Andrew Delgado | 2-6 3-6 |
2023 J60Santodomingo-2
| W | 2R | Jeremy Victoria | 6-4 6-4 |
| L | 3R | Cesar Mahecha | 4-6 4-6 |
2023 J60Santodomingo
| W | 2R | Elijah Max Calaquian | 6-3 6-1 |
| L | 3R | Jon Gamble | 6-3 5-7 1-6 |
2023 J60Guatemala
| L | 1R | Boxiong Zhang | 4-6 4-6 |
2022 J4Guatemala-3
| W | 1R | Jadon Skollar | 7-6 6-3 |
| W | 2R | Andres Rendon | 7-6 6-4 |
| W | QF | Cesar Mahecha | 6-2 6-0 |
| L | SF | Daniel Phillips | 3-6 2-6 |
2022 J5Santatecla-2
| W | 1R | Juan Carlos Fuentes Vasquez | 6-2 6-3 |
| W | 2R | Guillermo Alfonso Bennaton | 6-1 6-0 |
| W | QF | Gabriel Porras | 5-7 6-2 6-2 |
2022 Jb3Cancun
| W | 2R | Alejandro Flores Monteverde | 5-7 7-6 4-0 |
| L | 3R | Andres Delgadillo | 0-6 3-6 |
2022 J5Guatemala-2
| W | 1R | Tyler Nguyen | 7-5 6-3 |
| W | 2R | Salvador Price | 6-2 3-6 6-4 |
| L | QF | Bernardo Munk Mesa | 3-6 4-6 |
2022 J4Guatemala-2
| W | 1R | Javier Alonso | 6-3 6-1 |
| W | 2R | Cristian Felipe Sanchez Rojas | 6-1 7-6 |
| L | QF | Bernardo Munk Mesa | 1-6 6-7 |
2022 J4Santatecla-2
| W | 1R | Caden Goldammer | 6-2 6-1 |
| W | 2R | Juan Carlos Fuentes Vasquez | 2-6 6-3 6-0 |
| L | QF | Lincoln Battle | 4-6 1-6 |
2022 J5Santatecla
| W | 1R | Jason Daly | 6-3 6-2 |
| W | 2R | Jaime Febres Rechkemmer | 6-0 6-1 |
| L | QF | Daniel Kong | 6-7 3-6 |
2022 J4Managua-2
| W | 1R | Patricio Medrano | 4-6 6-4 6-4 |
| W | 2R | Rene Morales | 6-3 6-1 |
| L | QF | Julian Alonso | 3-6 4-6 |
2022 J4Managua
| W | 1R | Diego Pedrero Padelford | 6-2 6-4 |
| W | 2R | Luis Marquez | 6-4 4-6 3-2 |
| W | QF | Alejandro Ochoa | 6-3 6-4 |
| L | SF | Julian Alonso | 1-6 2-6 |
2022 J5Tegucigalpa-2
| W | 1R | Fabian Andres Matute | 6-0 6-0 |
| L | 2R | Alejandro Ochoa | 0-6 4-6 |
2022 J5Tegucigalpa
| W | 1R | Rene Morales | 6-2 7-5 |
| W | 2R | Thales Eduardo Andrade Sette | 6-1 6-2 |
| L | QF | Yubel Ubri | 2-6 6-7 |
2022 J4Llanosdecurundu
| L | 1R | Pablo Paternostro | 6-7 1-6 |
2022 J4Santatecla
| W | 1R | Walker Allen | 6-3 3-6 6-4 |
| L | 2R | Juan Pablo Patino Velasco | 3-6 0-6 |
2022 J4Lalibertad
| L | 1R | Adhithya Ganesan | 4-6 2-6 |
2022 J5Guatemala
| W | 1R | Alejandro Bravo Diaz | 6-1 6-2 |
| L | 2R | Hoyoung Roh | 1-6 1-6 |
2022 J4Guatemala
| W | 1R | Francisco Castro | 3-6 6-3 6-0 |
| W | 2R | Dominic Ducariu | 6-4 6-4 |
| L | QF | Diego Duran | 2-6 2-6 |
2021 J5Santatecla-3
| W | 2R | Ariel Bouskila | 6-4 6-1 |
| L | 3R | Thanaphat Boosarawongse | 6-7 3-6 |
2021 J5Santodomingo-2
| L | 1R | Jose Alessandro Hernandez Frias | 1-6 2-6 |
2021 J5Santodomingo
| L | 1R | Daniel Baquero | 5-7 5-7 |
2021 Jb3Cancun
| L | 1R | Miguel Angel Alonso | 6-7 4-6 |
2021 J4Guatemala
| L | 1R | Alejandro Licea | 4-6 4-6 |
2021 J5Santatecla-2
| L | 1R | Dominique Rolland | 1-6 4-6 |
2021 J5Santatecla
| W | 1R | Sebastian Aranzeta Boneta | 6-2 6-3 |
| L | 2R | Christopher Li | 2-6 4-6 |
2021 J4Guatemalacity
| L | 1R | Gianluca Ballotta | 0-6 3-6 |
Junior Tennis Database is a site that summarizes the results of ITF junior tennis tournaments.
Number of registered tournaments: 9280, Number of registered players: 5,748, Number of registered results: 305,685