The Brazilian defender only joined Porto last summer but the 20-year-old's performances have attracted the attention of the European champions
Amid a host of underwhelming results and a strong current of fan discontent, Real Madrid's efforts to rebuild the squad that has won four of the last five Champions League titles continue unabated.
Sunday's 2-1 victory over Betis may not have been overly convincing, but it gave a glimpse into what Santiago Solari and the Real hierarchy hope to achieve at the Bernabeu.
Youngsters like Vinicius Junior (18), Federico Valverde (20) and Sergio Reguilon (22) won starts in Andalusia, while Dani Ceballos (22), Cristo Gonzalez (21) and new signing Brahim Diaz (19) were summoned from the bench.