Brazil hope their second-half collapse against Japan will be a wake-up call ahead of their World Cup campaign.
Carlo Ancelotti's men went into Tuesday's international friendly in Tokyo on the back of Friday's 5-0 triumph at South Korea but came back down to earth against Japan, who celebrated their first-ever win against the five-time world champions.
Brazil led 2-0 at half-time but Japan punished the visitors' defensive errors to win 3-2.
"A second-half blackout by the entire team," Brazil captain Casemiro told Sportv. "If you sleep for 45 minutes, it could cost you a World Cup, a Copa América , a medal, a four-year dream. The whole team wasn't at its best in the second half, and it's the details. At this high level, it's the details that make all the difference. We know there