"I'm happy with the way this weekend turned out," he said. "It's true that with Sebastian last, there was an opportunity to reduce the gap more significantly but it's equally true that our performance and our grid position could have seen us lose points in this Grand Prix.
"I fought from start to finish: first with [Pastor] Maldonado, then Jenson [Button] and, in the end I tried to go and catch Kimi [Raikkonen]. I could not relax for a single lap.
"There were a number of unexpected retirements and two neutralisation periods that did not really come at the right time or suit us, but these are things beyond our control. Tonight I will go to sleep thinking the glass is half full rather than half empty."
There are two more races left this season.