BBC says that Kamui is smart not makinghis situation difficult when some other racer comes to attack him from behind; he opens the door.
I do think that I want to see Kamui defending his position harder.
To cause dangerous situation ans to open his door is something entirely different. The same goes to his activities in the team with Sergio Perez, a highly rated rookie.
Originally printed in Autosport article: Interview Peter Sauber 2011 april 21.
Another very important factor is that he is a true team player, and that's something Sergio also benefits from.
Kamui over takes almost everybody over takes him, but if he does not allow to open the door, he will over take guys in front rather than re-taking someone who was chasing him. GO!