MEXICO CITY • Nico Rosberg rejected his Mercedes team chief Toto Wolff's claim that he was motivated by anger when he secured pole position on Saturday for the Mexican Grand Prix.

Wolff, when asked what was driving Rosberg to take four successive poles, was brief and to the point.

"Angry," he said, with a broad smile.

His reference was linked to Rosberg's wheel-banging duel with team-mate Lewis Hamilton at the first corner of last week's United States Grand Prix won by the Briton, whose triumph also secured the world title.

But Rosberg, who was disappointed with Hamilton's actions in Austin and his decision to avoid clear-the-air talks or an apology for driving him off the track, rejected all suggestions that he is now motivated by anger.

"No, definitely not," he said. "No difference, just attack like always... I'm not angry, that wouldn't be the (right) approach.

"I just get my head down and keep going."

He said he had switched off from worrying about events in Austin.

He also added that nothing had changed and he had not had any talks with Hamilton.

"What is in the past is in the past and now we move forward," added the German.

Rosberg is fighting Ferrari's Sebastian Vettel to finish second overall.

AGENCE FRANCE-PRESSE, REUTERS