"It is not easy to fight Red Bull but we will never give up," said Alonso. "Well done Red Bull and Sebastian but we want to be happy in Brazil, not only here. I am sure we will do it.
"We lost points but this is what we expected this weekend as we are not fast enough, but we lost minimum points and there will be better races to come.
"We were fast in a straight line but still missing grip in the corners - hopefully that will come in the next few races."
There are three more races remaining this season.