Mateus signed a two-and-a-half-year contract with the champions of Serbia with an option of another two-year extension.
The 19-year-old right back, who is a product of Sao Paulo FC academy, spoke to our website.
“I’m honoured to have signed for Red Star. It’s a huge opportunity for me and I will work hard to become a first team player and show everyone what I can do.”
Mateus is still eligible to play for Zvezda’s youth team, but he will train with the senior squad.