Valtteri Bottas says he was disappointed not to mount a more convincing challenge against Ferrari in the Brazilian Grand Prix after achieving his aim of passing cars ahead from the start.

The Williams driver originally qualified in fourth position for the Interlagos race, but was demoted to seventh after being punished for passing under red flags in FP2.

Starting behind the Red Bull of Daniil Kvyat and Force India's Nico Hulkenberg, Bottas leapfrogged both from the start after a lightning getaway

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However, once up to fifth he couldn't sustain the pace of Ferrari's Kimi Raikkonen in front of him as he settled in for a lonely race.

"The start was good, I managed to gain a couple of important positions, because it would have been difficult to get through the Red Bull and the Force India, because overtaking is not that easy in this track. After that good start I had quite a lonely race, to be honest. There wasn't much happening for me today

"To be honest the pace was not there today, compared to Ferrari, so in any case it would have been difficult."

Bottas' result means he maintains a slender one point advantage over Raikkonen in their battle for fourth in the overall standings, with just one race in Abu Dhabi remaining.