Felipe Massa topped the time sheets for Williams in Barcelona today setting a very quick 1:23.500 in the FW37. Behind him Marcus Ericsson continued Sauber’s strong testing form with a 1:24.276. Mercedes had their worst day of testing so far, Hamilton came in third with a 1:24.881 before an MGU-K failure sidelined his silver arrow. Only Massa and Ericsson managed over 100 laps on what was a slower day than usual, poor Jenson Button only got 7 laps out of the temperamental McLaren-Honda before a hydraulic ended their running. Image: Williams/LAT
| POS | DRIVER | TEAM | TIME | LAPS |
| 1 | Felipe Massa | Williams | 1:23.500 | 103 |
| 2 | Marcus Ericsson | Sauber | 1:24.276 | 122 |
| 3 | Lewis Hamilton | Mercedes | 1:24.881 | 48 |
| 4 | Daniil Kyvat | Red Bull | 1:25.947 | 75 |
| 5 | Romain Grosjean | Lotus | 1:26.177 | 75 |
| 6 | Kimi Raikkonen | Ferrari | 1:26.327 | 80 |
| 7 | Carlos Sainz Jr | Toro Rosso | 1:26.962 | 86 |
| 8 | Jenson Button | McLaren | 1:31.479 | 7 |
