Real Madrid's move for Porto defender Eder Militao has been delayed, due to a fee owed to his previous club Sao Paolo, according to reports in Marca.
Militao has already agreed personal terms with the La Liga side, and Porto have sanctioned his departure, however the Brazilian club, where he played between 2010 and 2018, with one season in the first team.
The issue lies with €6m demanded by the South American side, as a training fee, as stipulated by FIFA, according to youth development compensation regulations.
Porto want the fee to be paid by Real as part of their bid for Militao, however they are unwilling to pay additional money they believe they are not responsible for.
That has created a blockage in the move, with neither side willing to budge, and Sao Paolo eligible to make the claim, as the promising central defender remains under 23.
It is likely that Real will seek intervention on this, and facilitate Militao's move in the summer, although they are set to pay more than the current offer of €50m.