Reigning Formula One world champion Fernando Alonso completed just one installation lap as rain in Spain dominated the second day of testing at Barcelona’s Circuit de Catalunya.
The conditions have led to an extension of the test that will now run until Thursday, rather than drawing to a conclusion tomorrow.
For the second successive day, though, Kimi Raikkonen again topped the unofficial timesheets in his Ferrari.
The Finn completed more laps than any other driver – 54 – and was fastest with a time of one minute 30.280seconds.
Raikkonen was 1.5 seconds quicker than Mark Webber for Red Bull Racing, and almost two seconds faster than Heikki Kovalainen in his Renault.
However, Raikkonen’s day ended with a spin at turn three and a run into the barriers, albeit with the car undamaged.
Alonso, co-leader in the drivers’ standings alongside Raikkonen and McLaren team-mate Lewis Hamilton, endured a frustrating day.
McLaren decided that with more rain predicted, and with limited Bridgestone wet weather tyres available, there would be little value in running a wet-weather programme.
That led to Alonso sauntering from the garage just once before deciding to call a halt in the early afternoon.
Other drivers on track were Nick Heidfeld (BMW Sauber), Nico Rosberg (Williams), Rubens Barrichello (Honda) and Jarno Trulli (Toyota) who were fourth, fifth, sixth and seventh quickest respectively.