for full FP3 times.
Williams set the pace in the final practice session for the Austrian Grand Prix as Valtteri Bottas headed four cars covered by 0.079s.
Bottas pulled out a fastest final sector on his final lap of the session to go top on a 1:09.848, leaving him just 0.050s ahead of Lewis Hamilton's Mercedes. It was a strong session for Williams, with Felipe Massa third quickest and only 0.003s slower than Hamilton.
Fourth was Daniil Kvyat in the Toro Rosso on a 1:09.927, while Nico Rosberg could only set the fifth quickest time with a 1:09.999 which left him just ahead of Fernando Alonso as the top six were separated by 0.206s. However, the quickest times were still 0.3s slower than Hamilton managed in Friday practice, suggesting Mercedes has plenty of pace in hand.
Daniel Ricciardo was seventh quickest – over half a second off the pace – with Kevin Magnussen, Kimi Raikkonen and Sebastian Vettel rounding out the top ten. Nico Hulkenberg and Pastor Maldonado were the other drivers within a second of Bottas' time.
Jenson Button hit trouble as he completed just four laps in the session. Having run wide at Turn 1 it transpired that McLaren had an engine braking issue and when he returned to the pits there was a small brake fire on the right rear which caused damage and forced Button to sit out the majority of the hour.
Drivers were still making mistakes and running wide in numerous places, with Sergio Perez twice going off at the final corner. On the first occasion he rejoined without too much drama, but the second time he bounced across the grass and was launched off the lip of an access road, the front wheels landing heavily before he could return to the track.
Kamui Kobayashi was also caught out at the final turn, dropping the car at the apex and spinning and relatively high speed before letting the car roll backwards in to the relative safety of the run-off area.