Complex sentence: D'Ambrosio argued that his defensive driving was fair, saying that he was doing his own race, and in the event the sport's governing body, the Fédération Internationale de l'Automobile, felt he was overly aggressive, he would be notified and issued with a warning.
Split into simpler sentences: D'Ambrosio argued that his defensive driving was fair, saying that he was doing his own race. He argued that in the event that the sport's governing body, the Fédération Internationale de l'Automobile, felt he was overly aggressive, he would be notified and issued with a warning.