Sebastian Vettel's rivals have been warned that the two-time World Champion will be even stronger this season as he goes in search of a hat-trick of titles.
The 24-year-old German blew his challengers away last year as he won 11 of the 19 races and claimed 15 pole positions en route to becoming the sport's youngest double World Champ.
Team owner Dietrich Mateschitz says there will be no let-up from the Red Bull driver this campaign as he will be another year wiser.
"He still has great potential ahead of him because his experience, his consistency and his domination in different situations will be given free rein," Mateschitz said in an interview with Speedweek magazine.
"His focus in qualifying was already part of his strength but he's going to be even stronger in competition because he knows the complexity of his sport even better now."
