The defender has been heavily linked with a loan switch to the Portuguese club next season.
The 21-year-old Brazilian is fluent in Portuguese and has claimed that the absence of a language barrier would make it easy for him to fit in at the Estadio Da Luz.
"I have a Portuguese passport, and speak the same language. The adjustment would be easy. There would be no problems, I think," he said.
"Portugal would be a good solution for me. I follow some of the league and I know Portuguese teams, because they are always good in European competition."
Fabio will reportedly spend the whole of next season in Lisbon.