Magalhaes praised the 21-year-old praise for his form so far after he struggled to break into the Arsenal starting XI at the start of the season.
The Brazil youth international has started Arsenal’s last five Premier League matches, scoring three goals in their last top flight two games against West Ham United and Leeds United.
“I am very happy for him. He has many great traits in a player, I’m sure it’s just beginning and he will make many Arsenal fans happy and he will make us happy as well,” he told Arsenal website.
Arsenal face bottom table Norwich on Boxing Day as they look to extend their fine run of form.