Los Blancos head coach Carlo Ancelotti has insisted that his club will not be signing any further players this summer, with Endrick and Kylian Mbappe set to be their only additions in the current window.
Real Madrid are a player down at the back, though, with Nacho leaving on a free transfer, and Los Blancos missed out on a move for Lille's Leny Yoro, who completed a switch to Manchester United.
However, it is widely expected that a new centre-back will move to Bernabeu next year, and according to Fichajes, three youngsters are on the club's radar.
The report claims that Valencia duo Gasiorowski, 19, and Mosquera, 20, are highly-rated by Real Madrid, while 18-year-old Reis is being tracked due to his form for Palmeiras.
Real Madrid are 'tracking' Gasiorowski, Mosquera and Reis
Gasiorowski came through the youth system at Valencia, and he made his breakthrough into the first team last season, ending the campaign with 16 appearances in all competitions.
The 6ft 3in centre-back featured on 14 occasions in La Liga last term and is expected to be regularly involved for Los Che in 2024-25.
Mosquera, meanwhile, also spent the latter stages of his youth career with Valencia before progressing to first-team level in 2021, and he has represented the first team on 49 occasions.
The defender, who helped Spain win Olympic gold this summer, made 38 appearances in all competitions at club level last term, including 36 outings in Spain's top flight, proving himself at the top level.
Who is Palmeiras teenager Reis?
Reis came through the youth system at Palmeiras, and he has now played 12 times for his Brazilian club's first team, scoring two goals in the process.
The centre-back has been capped at Under-16s and Under-17s level by Brazil, and he is regarded as one of the best young talents in South America.
Palmeiras are in a strong position when it comes to the defender's future, though, as he has a contract with the Green and Whites until December 2028, while there is allegedly a significant release clause in the deal.
Real Madrid's chief scout Juni Calafat will allegedly closely monitor the performances of all three of the young centre-backs this season before any decision is made on a potential move.