Renault driver Fernando Alonso raced the fastest during the young Formula 1 driver test in Abu Dhabi, with the best lap time of 1.36.333.
Alonso, who returns to full-time sports next season, completed 105 laps on the Yas Marina circuit and was two tenths of a second behind driver Mercedes Nyck de Vries in the second.
Stoffel Vandoorne, who drives alongside De Vries for the Mercedes Formula E team, was third fastest, with Robert Kubica fourth in the Alfa Romeo.
Yuki Tsonoda was the fifth fastest for AlphaTauri, with Juri Vips sixth for Red Bull, while Antonio Fuoco, Callum Ilott, Guanyu Zhou and Jack Aitken completed the top 10.
Ferrari junior driver Ferrari Shwartzmann completed most laps of the day, 129, with a best time of 1.38.157, placing him in 11th place.
Haas driver Mick Schumacher finished 15th and slowest, with a time of 1,39.947, completing 125 laps in total.
Test results for young drivers
1 Fernando Alonso Renault 1m36.333s 105
2 Nyck de Vries Mercedes 1m36.595s 110
3 Stoffel Vandoorne Mercedes 1m36.840s 82
4 Robert Kubica Alfa Romeo / Ferrari 1m37.446s 89
5 Yuki Tsunoda AlphaTauri / Honda 1m37.557s 123
6 Juri Vips Red Bull / Honda 1m37.770s 101
7 Antonio Fuoco Ferrari 1m37.817s 126
8 Callum Ilott Alfa Romeo / Ferrari 1m37.826s 93
9 Guanyu Zhou Renault 1m37.902s 98
10 Jack Aitken Williams / Mercedes 1m38.153s 78
11 Robert Shwartzman Ferrari 1m38.157s 129
12 Sebastien Buemi Red Bull / Honda 1m38.284s 77
13 Marino Sato AlphaTauri / Honda 1m38.495s 127
14 Roy Nissany Williams / Mercedes 1m39.800s 75
15 Mick Schumacher Haas / Ferrari 1m39.947s 125