Los Blancos were supposedly prepared to fork out £197m to prise the Frenchman away from PSG last month, only for Les Parisiens to stall over a deadline-day approach.
As a result, Mbappe is set to remain on the books at the Parc des Princes for the 2021-22 season before completing an expected free transfer to Real Madrid in the summer of 2022.
However, Marca reports that Los Blancos were trying until the last minute to complete a deal for Mbappe, which led to them registering Eduardo Camavinga as a Castilla player.
The report adds that Real did not want any unnecessary roadblocks in their ultimately unsuccessful pursuit of Mbappe, as their first-team squad was already at the maximum limit.
Mbappe scored his fourth goal of the 2021-22 Ligue 1 season in PSG's 4-0 win over Clermont on Saturday - a result which made it five wins out of five for Mauricio Pochettino's outfit.
Monaco 
Stade Brestois 29 
Bordeaux 
Nimes 
Bayern Munich 
FC Augsburg 
Paris Saint Germain 
Toulouse 
CSKA Moscow 
FC Rostov 
Leicester 
Chelsea 
Valencia 
Betis 
Dynamo Kyiv 
Chornomorets Odesa 
Verona 
Inter 
Bayer Leverkusen 
FC Heidenheim 
Borussia Dortmund 
SC Freiburg 
VFL Wolfsburg 
Union Berlin 
Arsenal 
Nottingham Forest 
Everton 
Brentford 
Spartak Moscow 
Lokomotiv Moscow 
Rangers 
Dundee Utd 
Atletico Madrid 
Alaves 
Lens 
Marseille 
Ingulets Petrove 
Shakhtar Donetsk 
AC Milan 
Juventus 
ST Malo 
Manchester City 
Tottenham 
Eintracht Frankfurt 
Werder Bremen 
Girona 
Espanyol 
Feyenoord 
Heerenveen 
ST Etienne 
Montpellier 
Grenoble Foot 38 
Heart Of Midlothian 
Celtic 
Reims 
Lyon 
PSV 
Groningen