The Portuguese playmaker left Benfica for Monaco in 2014 on loan before signing permanently in 2015, then signing for City in the summer of 2017.
And the 25-year-old has reiterated his desire to return to the Portuguese side in the future.
“I have already said it several times: I have this emptiness of having left a little early, so I think I will come back. If they want me there, I think I will come back,” he told Eleven Sports, as per Record.
City’s ban from all European competition was announced on Friday for allegedly breaching UEFA’s FFP rules and banned from entering European competition for the next two years.
The club are set to appeal the ban but there could also be repercussions in terms for their past Premier League title wins.
The deductions could be used between 2012 and 2016 when City won the Premier League twice, in 2012 and 2014 respectively.