Sometimes, a tactical problem can be explained better by one image than by detailed analysis from performance analysts at a club.

Real Madrid’s average position map from the 2-1 derby defeat to Atletico Madrid is one of those occasions.

Los Blancos travelled to the Metropolitano, which has not been a happy hunting ground for them for the past eight years.

In a derby marred by refereeing controversy, Madrid were reduced to 10 men after Dean Huijsen was sent off early in the second half.

Jose Mourinho made no attempt to hide his thoughts about the refereeing, but there were some concerning patterns emerging from the performance.

One of them is a cause for concern: Vinicius Junior and Kylian Mbappe’s average positions were effectively identical. In fact, the Brazilian’s marker is hidden underneath the Frenchman’s on the graphic.

There could not be a clearer visual representation of an issue Mourinho needs to solve.

The problem is not simply that both players prefer the left. Great attackers can rotate positions and combine in the same channel.