Mateo Barreiros Reyes (born 14 December 2000) is a Brazilian tennis player who was born in Ecuador.
Barreiros Reyes has a career-high ATP singles ranking of 595 achieved on 29 July 2024. He also has a career-high ATP doubles ranking of 590 achieved on 21 October 2024.
Barreiros Reyes has won one ATP Challenger doubles title at the 2025 Brazzaville Challenger.