Vettel expressed his anger during the Mexican Grand Prix on his team radio when he passed the Red Bull Verstappen in the final stage.
Ferrari also filed a complaint with the FIA about the behaviour of Verstappen. The Dutchman braked violently in the 68th round the first corner in an attempt to keep the Ferrari behind Vettel.
Vettel responded immediately after the race in Mexico following the defensive actions of Verstappen.
"My exit from the third corner was not good because I was fighting with Max Verstappen He tried to pull a trick with me Maybe I had it.. themselves can do better by coming off the bend better, but I knew it would be tight anyway with Daniel Ricciardo close behind me."
Both drivers where given penalties and neither made in onto the podium, which was instead occupied by the man who crossed the line in fifth, Daniel Ricciardo.
Bahrain International Circuit - Winter testing