Max Verstappen topped the final day of pre-season European Formula 3 Championship testing at Zeltweg on Wednesday.
The son of 1990s Formula 1 driver Jos Verstappen is stepping straight into F3 from karts with Van Amersfoort Racing this season, with Ferrari's Florida Winter Series his only car racing experience so far.
Despite being a frontrunner throughout testing, 16-year-old Verstappen played down his chances in the European F3 opener at Silverstone later this month.
"Even though I did quite well in testing, that doesn't mean that I will be winning races at Silverstone right away," he said.
"I still have some things to learn, but I reckon that I am heading into the right direction."
Tom Blomqvist was second quickest for Carlin as he made up for lost time after the engine problems that prevented him from running on Tuesday. The Briton lapped 0.240 seconds off Verstappen's 1m23.690s benchmark.
Carlin provided all Verstappen's main opposition, with Blomqvist's team-mates Antonio Giovinazzi, Ed Jones, Jake Dennis and Jordan King completing the top six.
Last season's runner-up Felix Rosenqvist was seventh for Mucke, ahead of Ferrari protege Antonio Fuoco in Prema's fastest car.
Verstappen's team-mate Jules Szymkowiak sat out the second day due to engine problems that had developed on day one.
Formula Renault 3.5 driver Marco Sorensen again stood in for fellow Lotus F1 junior Oscar Tunjo at the Renault-powered Signature squad.
Pos Driver Team/Car Time Gap 1. Max Verstappen Van Amersfoort Dallara-VW 1m23.690s 2. Tom Blomqvist Carlin Dallara-VW 1m23.930s +0.240s 3. Antonio Giovinazzi Carlin Dallara-VW 1m23.932s +0.242s 4. Ed Jones Carlin Dallara-VW 1m24.296s +0.606s 5. Jake Dennis Carlin Dallara-VW 1m24.298s +0.608s 6. Jordan King Carlin Dallara-VW 1m24.466s +0.776s 7. Felix Rosenqvist Mucke Dallara-Merc 1m24.503s +0.813s 8. Antonio Fuoco Prema Dallara-Merc 1m24.504s +0.814s 9. Mitchell Gilbert Fortec Dallara-Merc 1m24.529s +0.839s 10. Riccardo Agostini Eurointernational Dallara-Merc 1m24.546s +0.856s 11. Esteban Ocon Prema Dallara-Merc 1m24.595s +0.905s 12. Gustavo Menezes Van Amersfoort Dallara-VW 1m24.612s +0.922s 13. John Bryant-Meisner Fortec Dallara-Merc 1m24.622s +0.932s 14. Nicholas Latifi Prema Dallara-Merc 1m24.696s +1.006s 15. Lucas Auer Mucke Dallara-Merc 1m24.761s +1.071s 16. Sean Gelael Carlin Dallara-VW 1m24.832s +1.142s 17. Roy Nissany Mucke Dallara-Merc 1m24.957s +1.267s 18. Felipe Guimaraes Double R Dallara-Merc 1m24.992s +1.302s 19. Dennis van de Laar Prema Dallara-Merc 1m25.185s +1.495s 20. Felix Serralles West-Tec Dallara-Merc 1m25.283s +1.593s 21. Michele Beretta Eurointernational Dallara-Merc 1m25.501s +1.811s 22. Spike Goddard T-Sport Dallara-Nissan 1m25.588s +1.898s 23. Alexander Toril T-Sport Dallara-Nissan 1m25.649s +1.959s 24. Sandro Zeller Jo Zeller Dallara-Merc 1m25.726s +2.036s 25. Marco Sorensen Signature Dallara-Renault 1m25.836s +2.146s 26. Hector Hurst West-Tec Dallara-Merc 1m25.995s +2.305s 27. Tatiana Calderon Signature Dallara-Renault 1m26.251s +2.561s