Valtteri Bottas topped FP1 at the Abu Dhabi Grand Prix, as engine mileage caused headaches for Lewis Hamilton and Daniel Ricciardo and Sebastian Vettel made yet another mistake.

Ricciardo's Renault engine gave up the ghost mid-session, spraying oil onto the track and onto the visor of Pierre Gasly, who was circulating close behind at the time of the failure.

A PU change will be made before FP2, but Ricciardo is not expected to serve a penalty.

The session ended with Vettel spinning backwards into the barriers in the last sector. Vettel hit the wall rear-end first, which will raise fears of the need for a new gearbox.

Hamilton also reported losses of power in the session and his Mercedes went into limp mode at one point. His team-mate Bottas will start Sunday's race from the back of the grid, despite showing good pace here, as he has taken a new engine for the season-finale.

Abu Dhabi GP FP1 results

1. Valtteri Bottas (Mercedes) 1:36.957
2. Max Verstappen (Red Bull) 1:37.492
3. Lewis Hamilton (Mercedes) 1:37.591
4. Alexander Albon (Red Bull) 1:38.084
5. Sebastian Vettel (Ferrari) 1:38.906
6. Romain Grosjean (Haas) 1:39.146
7. Charles Leclerc (Ferrari) 1:39.249
8. Kevin Magnussen (Haas) 1:39.350
9. Antonio Giovinazzi (Alfa Romeo) 1:39.423
10. Nico Hulkenberg (Renault) 1:39.505
11. Lando Norris (McLaren) 1:39.628
12. Lance Stroll (Racing Point) 1:39.864
13. Kimi Raikkonen (Alfa Romeo) 1:39.888
14. Sergio Perez (Racing Point) 1:39.901
15. Daniil Kvyat (Toro Rosso) 1:39.969
16. Pierre Gasly (Toro Rosso) 1:40.401
17. Carlos Sainz (McLaren) 1:40.687
18. Robert Kubica (Williams) 1:40.792
19. Daniel Ricciardo (Renault) 1:40.850
20. George Russell (Williams) 1:41.362