The defeat puts Mano Menezes's job under pressure, but it is Rafael who has been blamed after he gave the ball away for the Mexican first goal in the opening seconds.
He also tried a backheel in a defensive area with time running out that led to him being substituted.
"Right back Rafael knows he made a mistake that led to the first Mexican goal in the Olympic football final in the London 2012 Games.
"There's no denying it. Nevertheless, with his skill and determination, the young No. 2 can't be tainted by the error."
"Mistakes are for correcting. Rafael knows that. Later, when things have calmed down, he will surely look at the move and learn from it. At the end of the day, as the saying goes, to err is human and we learn from our mistakes."