Marc Marquez has rejected Valentino Rossi's suggestion that he "acted as bodyguard" for Jorge Lorenzo in the season finale instead of challenging him for the win.
The 2015 MotoGP campaign came to a controversial end in Valencia on Sunday with Lorenzo winning the race and taking the title after Rossi could only manage a P4.
Rossi, who started from the back of the grid as punishment for kicking Marquez in Malaysia, was furious after the race as he felt Marquez and his Repsol Honda team-mate Dani Pedrosa helped Lorenzo to win.
"I don't know if Marquez protected Lorenzo because they are both Spanish, but it's sad he chose to be his bodyguard," the Italian said.
However, double World Champion Marquez says he is "insulted" by the allegation.
"Of course I respect all the opinions, and I accept when I win and when I lose, but with my mentality, when people say that you didn't try to win the race, you just tried to disrupt someone else, I feel insulted," he said.
"Always when I go out on the track I gave my 100 per cent.
"In practice I gave 100 per cent. In the race I gave 100 per cent.
"And I always did and I will always do it like this."