However, the 21-year-old, who arrived from Sao Paulo in January, has vowed to continue to work hard in the French capital.
He told Globo Esporte: "I haven't been able to show everything I can do. I haven't completely adapted to French football, but I am not bad, I'm feeling well there and I like everything there.
"It's step by step, my father has always said that. Little by little. I have to build my path. I will not lose heart. I will keep my head up."
Moura came close to joining Manchester United before penning a deal with the French outfit at the start of the year.