Felipe Massa has hit out at the Brazilian race stewards for a "pretty unacceptable" penalty that cost him in his Ferrari swansong.
Massa was slapped with a drive-through penalty during Sunday's race at the Interlagos circuit after the stewards ruled that he crossed the pit entry line.
The Ferrari driver reacted angrily, shouting "unbelievable" over the radio before eventually pulling into the pits to take the penalty.
"I think it's pretty unacceptable to be honest. Why a drive-through for this? I'm sure I was not the only car to pass that line. I was the only one who got the drive-through for that," he told Sky Sports F1
"I didn't do anything wrong, I didn't overtake any cars on the outside of the track. But it's like that.
"They believe they have all the power, they believe they know everything they're doing and normally they are doing a lot of things which are not right, which are not correct."
Despite the penalty, Massa still managed to score points in his final race as the Brazilian brought his car home in seventh place.
"I feel very emotional for what I have achieved and what we have achieved together, I have made a lot of friends and I want to thank them all.
"It will be really tough to say goodbye but I am ready to do it and I am ready to celebrate."