Using Super Soft tires fitted to his Williams, Felipe Massa clocked a 1:19.726 during Tuesday morning's session at the Circuit de Barcelona-Catalunya as Formula 1 returned to action for the second pre-season test.
Massa's time was just 0.021s down on last week's fastest lap, set by Mercedes' Valtteri Bottas on Ultra Softs, as he added much-needed mileage to the FW40, following Lance Stroll's incidents across the first test.
Red Bull's Daniel Ricciardo clocked a 1:19.900 on Ultra Soft Pirellis.
Lewis Hamilton was third fastest for Mercedes of Soft tires, with Sebastian Vettel putting Ferrari fourth on the hard medium tires. Ferrari continues to run harder tires than anyone else yet their times are very competitive, which has the opposition worried.
Force India's Esteban Ocon claimed fifth position, in front of Haas' Kevin Magnussen and Toro Rosso's Daniil Kvyat.
Stoffel Vandoorne returned to the cockpit of the McLaren MCL32 and placed eighth, ahead of returnee Pascal Wehrlein.
Jolyon Palmer finished last, five seconds down on Massa, following a truncated morning for Renault.
Palmer coasted back into the pit lane after just 15 laps of running and did not reappear before lunch, with Nico Hulkenberg poised to take over duties this afternoon.
Morning Times – Day 1 (Test 2)
1. Felipe Massa – 1:19.726 (Super Softs), 67 laps
2. Daniel Ricciardo – 1:19.900 (Ultra Softs), 52 laps
3. Lewis Hamilton – 1:20.456 (Softs), 49 laps
4. Sebastian Vettel – 1:21.127 (Mediums), 82 laps
5. Esteban Ocon – 1:21.347 (Super Softs), 59 laps
6. Kevin Magnussen – 1:21.676 (Softs), 48 laps
7. Daniil Kvyat – 1:21.965 (Softs), 45 laps
8. Stoffel Vandoorne – 1:22.698 (Softs), 34 laps
9. Pascal Wehrlein – 1:23.336 (Softs), 47 laps
10. Jolyon Palmer – 1:24.790 (Softs), 15 laps