Pierre-Emerick Aubameyang claims playing for Real Madrid is his "main goal" and that the European champions are the only club that could persuade him to leave Borussia Dortmund.
The Gabon international stated in an interview last year that he had made a promise to his grandfather that he would one day play for Madrid.
But Aubameyang has reiterated that only Zinedine Zidane's side could tempt him away from Signal Iduna Park.
"This year, no," he told ZDF when asked about a possible move.
"But the only club I would leave Dortmund for are Real Madrid. If they don't come calling, I don't leave.
"My grandfather, the dad of my mum, always wished that I would play in Spain. Two years ago, when he died, I promised him that someday I will play for Real - and I work hard to reach that goal.
"Real Madrid is my main goal but at the moment I like it in Dortmund. If there is a chance to go to Madrid, I will say immediately yes - but at the moment there is no contact."
Tuchel said: "Because of his perfect French, Auba is the perfect integrative figure for Ousmane Dembele.
"I think that Auba is adult enough to play a role like this."
