Brazil manager Carlo Ancelotti's reaction to Gabriel Martinelli's game-winning goal against Japan may surprise you

Carlo Ancelotti's emotionless reaction to Gabriel Martinelli's goal shows composure 

Ancelotti didn't show any emotion after any of the three goals in Monday's contest. Compare that to Japanese manager Hajime Moriyasu. He wasn't much more emotive, but he at least smiled after midfielder Kaishu Sano scored in the 29th minute.

Ancelotti's reactions could be construed as robotic, but others would call them poised. Without his composure, Brazil may have lost Monday's game. 

After Sano scored the goal, it marked the first time Brazil trailed a team that was neither European nor South American at the World Cup, according to soccer stats guru Mister Chip (also known as Alexis Martin-Tamayo).

A hot-headed manager may have lost his cool after seeing his team trailing a non-soccer powerhouse. Ancelotti isn't that. He's the coach who stays calm and makes tactical changes. 

He subbed in forward Endrick for injured midfielder Lucas Paqueta (apparent left leg issue) at halftime, switching from a 4-3-3 to a 4-2-4. Changing to this formation was risky for Brazil after it struggled to defend Japan in the midfield for most of the first half, but it worked. Brazilian forward Casemiro scored in the 56th minute. 

Figure on Ancelotti showing little emotion for the rest of the World Cup. That may lead to suggestions that he's apathetic, but that's not the case. The 67-year-old manager could simply be contemplating his strategy, which just may help Brazil win its long-awaited sixth World Cup title.