Sebastian Vettel not worries about Fernando Alonso

Sebastian Vettel qualified fourth for Sunday's showdown Brazilian Grand Prix and then said he was less concerned with title rival Fernando Alonso than his own performance.

The 25-year-old German defending champion said he was figuring out where he had lost time in Q3 for Sunday's race and was not concerned at being four places ahead of the Ferrari-driving Spaniard.

Asked if the championship situation was the biggest thing on his mind, Vettel replied: "Not too much. I've just come out of qualifying knowing I could have done a little bit better.

"I'm keen to go back now and look at the data and see where I wasn't quick enough.

"The first run in Q3 was not good for me as I did a mistake going into Turn Four. The second run I was pretty happy with it but it wasn't quick enough."

He added: "Obviously Mark (Webber, who placed third) was a bit quicker, but I think we are in good shape and we've been competitive all weekend."

Alonso's Ferrari team-mate Brazilian Felipe Massa starts just one place behind Vettel in fifth, but Massa insisted this did not bother him in the slightest.

He said: "There are always going to be cars around you.

"It would be boring if it were just me on the grid. I think that's pretty normal.

"We have mirrors on the car -- but we try not to use them too much."