| Junior | |
| Fullname: | Luis Antonio Martínez Mateo |
| Birth Date: | 4 July 1997 |
| Birth Place: | Madrid, Spain |
| Height: | 1.72 m |
| Position: | Midfielder |
| Currentclub: | Illescas |
| Clubnumber: | 20 |
| Youthyears1: | 2016 |
| Youthclubs1: | Rayo Vallecano |
| Years1: | 2016–2017 |
| Clubs1: | Alcobendas |
| Caps1: | 21 |
| Goals1: | 1 |
| Years2: | 2017–2018 |
| Clubs2: | Leganés B |
| Caps2: | 37 |
| Goals2: | 4 |
| Years3: | 2018 |
| Clubs3: | Unionistas |
| Caps3: | 9 |
| Goals3: | 0 |
| Years4: | 2019 |
| Clubs4: | Arenas |
| Caps4: | 13 |
| Goals4: | 0 |
| Years5: | 2019–2020 |
| Clubs5: | Internacional Madrid |
| Caps5: | 27 |
| Goals5: | 3 |
| Years6: | 2020 |
| Clubs6: | Real Murcia |
| Caps6: | 3 |
| Goals6: | 0 |
| Years7: | 2021 |
| Clubs7: | Internacional Madrid |
| Caps7: | 9 |
| Goals7: | 1 |
| Years8: | 2021–2022 |
| Clubs8: | Langreo |
| Caps8: | 32 |
| Goals8: | 3 |
| Years9: | 2022–2023 |
| Clubs9: | Estepona |
| Caps9: | 20 |
| Goals9: | 1 |
| Years10: | 2023– |
| Clubs10: | Illescas |
| Caps10: | 18 |
| Goals10: | 0 |
| Nationalyears1: | 2019 |
| Nationalteam1: | Dominican Republic |
| Nationalcaps1: | 1 |
| Nationalgoals1: | 0 |
| Club-Update: | 20:26, 25 July 2024 (UTC) |
Luis Antonio Martínez Mateo (born 4 July 1997), sportingly known as Junior, is a Spanish-born Dominican footballer who plays as a midfielder for Segunda Federación club CD Illescas and the Dominican Republic national team.
Junior made his debut for Dominican Republic on 24 March 2019.[1]