Formula One testing resumed at Jerez, Spain on Thursday, with Williams's Rubens Barrichello topping the times during a rain-lashed day.
The wet weather restricted running for most of the front-runners, with the session even having to be stopped due to standing water at one point.
The conditions ensured plenty of wild moments for the drivers that did venture out, with the Virgin F1 car spinning off the track and into the gravel trap, and Kovalainen spinning in the Lotus, damaging its front wing during the session.
Kovalainen confirmed the spin was a result of his mistake, and the team does not have a replacement front nose section, taking it out of action for the day.
Jerez F1 test times
1. Barrichello (Williams-Cosworth) 1:27.145 2. Petrov (Renault) 1:27.828 3. Vettel (Red Bull-Renault) 1:28.162 4. Rosberg (Mercedes GP) 1:28.515 5. Massa (Ferrari) 1:28.879 6. de la Rosa (BMW-Sauber) 1:29.691 7. di Resta (Force India-Mercedes) 1:30.344 8. Glock (Virgin-Cosworth) 1:30.476 9. Liuzzi (Force India-Mercedes) 1:30.66610. Hamilton (McLaren-Mercedes) 1:31.63311. Buemi (Toro Rosso-Ferrari) 1:32.67812. Kovalainen (Lotus-Cosworth) 1:33.554