Renault driver Fernando Alonso went fastest during the Formula 1 post-season young driver test in Abu Dhabi, with a best lap time of 1.36.333.
Alonso, who returns to the sport on a full-time basis next season, completed 105 laps of the Yas Marina circuit and was two tenths clear of Mercedes driver Nyck de Vries in 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 fifth fastest for AlphaTauri, with Juri Vips sixth for Red Bull, while Antonio Fuoco, Callum Ilott, Guanyu Zhou and Jack Aitken rounded out the top 10.
Ferrari junior driver Robert Shwartzmann completed the most laps of the day, 129, with his best time of 1.38.157 placing him 11th.
Haas driver Mick Schumacher finished 15th and slowest with a best time of 1.39.947, completing 125 laps in total.