In Formula 1, it’s always complicated and to some extent subjective determining if a good (or a bad) performance is due to the talent of the driver or to the quality of the car. That’s why the teammate battle is so important: the teammate is the only other driver on circuit that has the same equipment, and almost all the differences in results are due to differences between the drivers.
This chart shows the careers of the 2015 season drivers, displaying how many percent of his team’s points, in a given year, the driver was able to score. The math is simple: if the driver scored more than 50% of his teams points (a blue bar, going up), he won the teammate battle. If he scored less than 50% (a red bar, going down), he lost it. The y axis shows the percentage (the top of blue bars and the bottom of red bars), the x axis shows the corresponding season. Hover the bars to see more information (as the name of the team and the competing teammate).
Choose the driver:
Some additional explanations:
Source of almost all the data: www.f1fanatic.co.uk.