"Playing with a yellow is hard", Neymar added.
Neymar was critical of referee Jair Marrufo and explained that, even if the official did not think it was a spot-kick, the decision to give him a booking was excessive.
The one-sided result followed on from a 2-0 triumph over the United States as Brazil look to move on following their disappointing campaign in Russian Federation, where they were knocked out by Belgium in the last eight.
"It is an honour to be back winning and making goals and playing with my team-mates as best as possible".
The crowd was less than half the 67,619 who attended the Selecao's previous appearance at FedEx Field, against the U.S.in 2012.
Both sides made changes at halftime but the five-times world champions took just five more minutes to get a fourth goal, with Richarlison scoring his second when he pounced onto a loose ball to rifle home a low shot from inside the box.
"I am delighted to get two goals and for the chance that coach Tite gave me". With 59 goals in 92 global appearances, he is third in Brazilian history behind Pele (77) and Ronaldo (62).
Neymar dribbled past two defenders in the 16th minute before laying off a pass to Richarlison, who one-timed a shot from the edge of a penalty area in his second worldwide appearance.
Neymar opened the scoring with a penalty after four minutes before a Richarlison double as well as goals from Philippe Coutinho and Marquinhos completed the scoring.
"It was good to see this growth for us all", said the forward.