Sometimes, Formula 1 free practice performances are more clear-cut than others. On Friday in Mexico, Ferrari was fastest on single-lap pace, Force India on adjusted single-lap pace, Mercedes on super-soft and soft Pirelli long-run pace and Red Bull based on medium long runs.
You could argue this is all meaningless, but dig a little deeper and it reveals some fascinating characteristics of the Mexico City circuit, and answers some of the questions posed by a glance at the fastest laptimes of the day.
There were a few conditions that made Friday's running unusual. Firstly, the anticipated evolution of the track since last year was non-existent, much to the surprise of Pirelli and the teams. While the track is evolving and will continue to during the race weekend, the asphalt remains in a similar, low-grip state to last year.