BARCELONA, Spain -- Kimi Raikonen took Ferrari to the top of the timing screens at the second day of winter testing, edging Mercedes' Lewis Hamilton by just 0.023s.
Raikkonen's headline time of 1:20.960 capped a successful day for Ferrari, which included over a century of laps. It continued the good work started by Sebastian Vettel on Monday, though Ferrari has remained low-key about its new car, the SF70-H, and its progress in testing so far, possibly mindful of the strong start it had to winter last year before a winless season.
Though headline times are of limited significance, Raikkonen's quickest time was on the soft tyre, while Hamilton -- who only drove in the morning but still finished second -- set his on the super-soft tyre. Pirelli's wider new compounds are still a relative unknown, meaning it is unlikely teams have started extracting anywhere close to the maximum from their rubber at this stage.
Hamilton completed an exact race distance -- 66 laps -- in the morning, before handing the car over to Valtteri Bottas in the afternoon as Mercedes continued its programme of alternating sessions between its drivers. Bottas had an even more productive time behind the wheel, joining Raikkonen in the centurion club in just four hours, though his session nearly ended in the wall after losing control of the rear of the car at Turn 9. The Finn did well to save the slide and only grazed the inside wall, returning to the pits with paint missing from his right rear tyre, before continuing with a slightly delayed race simulation.
Max Verstappen and Red Bull laid good foundations following back-to-back problems on Monday, recording 89 laps in the RB12. Behind him was Haas' Kevin Magnussen, who led the mileage chart on an impressive day of testing for the Haas team and for the Dane, the only driver to do two full days back-to-back in the more demanding 2017 cars.
Esteban Ocon's first day in the Force India VJM10 saw him finish fifth and complete 96 laps, a day which was delayed in the morning after a stoppage at Turn 10 following a puff of smoke from the rear of the car. Jolyon Palmer completed just one lap in the morning as Renault completed overnight changes, but he recovered to a more respectable haul of 53 laps by the chequered flag.
Sauber's Pascal Wehrlein stand-in, Antonio Giovinazzi, had a slow start to his first day in blue and white, finishing the morning with just a handful of laps due to a power unit change. However, the Ferrari reserve driver had a much more fruitful afternoon, accumulating 66 laps.
The bottom two places were occupied by teams with more difficult days. McLaren endured further Honda gremlins in the morning which required a time-consuming power unit change, meaning Stoffel Vandoorne could only get back out again in the final hour and a half of the session. He finished on 40 laps -- meaning McLaren has only just surpassed a race distance in two days of testing, a mark Mercedes has hit in every session (morning and afternoon) on both days.
Williams rookie Lance Stroll rounded off the times, but he had a debut test session to forget, spinning off at the top of Turn 9's hill and sliding off the road. The spin looked fairly innocuous -- he was able to continue and return to the pits -- but it caused damage which forced Williams to end its day before the lunch break.
Times at close:
1. Kimi Raikkonen - Ferrari - 1:20.960 - 108 laps
2. Lewis Hamilton - Mercedes - 1:20.963 - 66 laps (morning)
3. Max Verstappen - Red Bull - 1:22.200 - 89 laps
4. Kevin Magnussen - Haas - 1:22.204 - 119 laps
5. Esteban Ocon - Force India - 1:22.509 - 86 laps
6. Daniil Kvyat - Toro Rosso - 1:22.956 - 68 laps
7. Valtteri Bottas - Mercedes - 1:22.968 - 102 laps (afternoon)
8. Jolyon Palmer - Renault - 1:24.139 - 53 laps
9. Antonio Giovinazzi - Sauber - 1:24.617 - 66 laps
10. Stoffel Vandoorne - McLaren - 1:25.600 - 40 laps
11. Lance Stroll - Williams - 1:26.040 - 12 laps