Ferrari's Felipe Massa has called on Formula One's governing body to get tough with McLaren's Lewis Hamilton after the pair clashed yet again on track at the Japanese Grand Prix.
The pair, who've collided already this season in Monaco and Singapore, had another incident at the chicane early in the title-decider while challenging for fourth place.
Stewards reviewed the incident but decided no further action was required.
Hamilton, the 2008 champion who now seems unable to go through a race without courting controversy, says his mirrors had been vibrating so much on the straight he had not seen Massa.
Hamilton finished fifth and Massa seventh in the race won by Hamilton's McLaren teamate Jenson Button.
Red Bull's Sebastian Vettel finished third in doing so winning the drivers championship for the second year in a row.