The San Siro showpiece represents the biggest stage in domestic football, but the Brazil international says it is the little things that will decide who emerges victorious.
Real Madrid's Champions League fate rests in the hands of the "small details" according to defender Marcelo.
Zinedine Zidane's men take on city rival Atletico at the San Siro as they go in search of an 11th European crown on Saturday.
It is a repeat of the 2014 final in Lisbon, when Carlo Ancelotti led Real to a 4-1 triumph after extra time, and it pits some of football's biggest talents head-to-head as the likes of Cristiano Ronaldo and Antoine Griezmann battle it out for continental supremacy.