Montmelo (Spain): Two days after the Spanish Grand Prix, drivers Sebastian Vettel, Nico Rosberg and Jenson Button set the pace on the first of two days of Formula One testing. The session on Tuesday saw 10 racing drivers taking part, reports Efe. Triple champion Vettel in his Ferrari car, who came in third in last Sunday's Grand Prix surprisingly won by the 18-year-old Dutchman Max Verstappen in a team Red Bull car, finished with the best time (1:23.220) after completing 103 laps. The second fastest was Nico Rosberg for Mercedes with 1:23.337. Rosberg with Mclaren's Jenson Button, who finished with 1:23.753, and France's Romain Grosjean of Haas with 1:23.882, were the only ones in the race to come in under 1:24. Two other drivers, Daniel Ricciardo of Red Bull and Pascal Wehrlein of Manor, completed the list of six championship drivers in these tests. The other four were young drivers. Only the Sauber team was absent from the tests.