Pastor Maldonado and Bruno Senna may have finished in the points for Williams but the Venezuelan driver lamented a KERS failure.
Maldonado believes he could have finished on the podium had he not suffered a failure.
"We missed the opportunity to finish on the podium today after we lost the use of KERS following the first safety car period. For sure there was more in the car", he said.
"The pace was good and at the beginning I was closing the gap to Kimi but we still collected some good points today and it was a great race. I feel very motivated within the team. We now need to keep the car at the top and I am looking forward to the last two races".
Senna praised the attitude of his team after he was facing backwards on the opening lap.
"It was a very tough weekend but it had a sweet taste in the end. I had a good start getting myself into a good position for Turn 1 but then a few cars tangled ahead and hit me. I had to start from zero again but I kept my cool", he said.
"There was a lot going on but we had good pace when we needed it and scored some solid points for the team. It is what we are here for and we never give up. There is a good energy and feeling now going into the final two races in Austin and Brazil".