Barcelona - Russian Formula Two driver Nikita Mazepin set the fastest lap for Mercedes on his official test debut with the Formula One world champions at Barcelona's Circuit de Catalunya on Wednesday.
The 20-year-old lapped with a best time of one minute 15.775 seconds on the softest C5 tyres, only 0.264 off regular race driver Valtteri Bottas's Tuesday pace on the same compound, and did 128 laps.
"Today was incredible. Being a part of this team, even just for this day was very special for me," said the Russian, whose billionaire father tried unsuccessfully to buy the Force India (now Racing Point) team last year.
"It's every young driver's dream to drive a car like this and today mine came true."
Thai driver Alexander Albon was second fastest for Toro Rosso with Italian Antonio Fuoco, testing for Ferrari, third on the timesheets.