Romain Grosjean has admitted that Lotus's late start to pre-season testing leaves them struggling in the wake of rivals ahead of the first race in Melbourne next month.
Bahrain test, Day One timesheet:1. Nico Hulkenberg, Force India, 1:36.880, 78 laps.
2. Fernando Alonso, Ferrari, 1:37.879, 64 laps.
3. Lewis Hamilton, Mercedes, 1:37.908, 74 laps.
4. Kevin Magnussen, McLaren, 1:38.295, 81 laps.
5. Sebastian Vettel, Red Bull, 1:40.224, 14 laps.
6. Adrian Sutil, Sauber, 1:40.443, 82 laps.
7. Robin Frijns, Caterham, 1:42.534, 68 laps.
8. Daniil Kvyat, Toro Rosso, 1:44.346, 5 laps.
9. Romain Grosjean, Lotus, 1:44.832, 8 laps.
10. Felipe Massa, Williams, No time, 5 laps.
11. Jules Bianchi, Marussia, No time, 3 laps.
Total pre-season laps by each team:Mercedes - 383.
McLaren - 326.
Ferrari - 315.
Sauber - 245.
Force India - 224.
Williams - 180.
Caterham - 144.
Toro Rosso - 59.
Red Bull - 35.
Marussia - 33.
Lotus - 8.
Total pre-season laps by each engine manufacturer:Mercedes - 1,113.
Ferrari - 593.
Renault - 246.
The Sky Sports F1 Online team will be providing live commentary of all three winter tests, with live updates from trackside also on Sky Sports News.
