McLaren driver Lewis Hamilton has secured the fastest time in the first practice ahead of Sunday's Abu Dhabi Grand Prix.
The 27-year-old, who will join Mercedes next season after penning a three-year deal with the team, launched to the top of the standings after the first practice with his teammate Jenson Button just behind.
A strong final lap from Button helped the Brit secure the second-fastest time, while Championship favourite Sebastian Vettel of Red Bull finished the course in the third-quickest time with his biggest rival Fernando Alonso in fourth.
Mark Webber recorded the fifth-best time in the opening practice, while Mercedes driver Michael Schumacher clocked the sixth-fastest time.
First practice standings:
1. Lewis Hamilton - McLarem
2. Jenson Button - McLaren
3. Sebastian Vettel - Red Bull
4. Fernando Alonso - Ferrari
5. Mark Webber - Red Bull
6. Michael Schumacher - Mercedes
7. Pastor Maldonado - Williams
8. Nico Rosberg - Mercedes
9. Valtteri Bottas - Williams
10. Kimi Raikkonen - Lotus
11. Felipe Massa - Ferrari
12. Nico Hulkenberg - Force India
13. Kamui Kobayashi - Sauber
14. Romain Grosjean - Lotus
15. Jules Bianchi - Force India
16. Sergio Perez - Sauber
17. Daniel Ricciardo - Toro Rosso
18. Jean-Eric Vergne - Toro Rosso
19. Heikki Kovalainen - Caterham
20. Timo Glock - Marussia
21. Pedro de la Rosa - HRT
22. Max Chilton - Marussia
23. Ma Qinghua - HRT
24. Giedo van der Garde - Caterham