Rosberg claimed the spoils by five points after finishing second behind British flyer Lewis Hamilton in the season-ending Abu Dhabi Grand Prix on Sunday.
It ended another year-long battle between the Mercedes pair that swung one way and then another, and caused a further deterioration in the duo's relationship.
Hamilton suffered more than Rosberg with mechanical problems and, despite winning 10 grands prix to his rival's nine, came up short in the race for the title.
It is this fact that a few pundits have highlighted, suggesting that there was a great deal of luck behind the German's triumph - but Ferrari's Raikkonen does not see it that way.
"He scored more points and I don't understand why he wouldn't deserve it," he said. "They had the same car and he came out on top, so fair play. He was better this year, as simple as that."
Formula 1 last week