Vettel says at age 24 he can still improve because there are a lot of areas to understand.

Vettel: It's always a difficult question to know where to improve. I think, being 24, there are a lot of areas to understand, a lot of bits inside and outside the car. You always need to be ready to learn, and small steps can make the difference. When I look at Korea, we were able to learn from Japan - both the team and myself. Only small things sometimes, but we addressed them and did a better job. You have to be open like that, always ready to learn and working always for the next race.