Matheus Pucinelli de Almeida (born 1 April 2001) is a Brazilian tennis player.

Pucinelli de Almeida has a career high ATP singles ranking of World No.

Pucinelli de Almeida won the 2019 French Open – Boys' doubles title.

Puccinelli was first nominated to play for Brazil in Davis Cup in September 2021 against Lebanon.

[2] Pucinelli made his debut in Davis Cup against Roey Tabet and won in straight sets which allowed the Brazilian team to confirm the 4–0 tie and advance into the 2022 Davis Cup qualifying round.