The development driver impresses finishing 15th out of 22 drivers . The Australian 's teammate and last year 's race winner Sebastian Vettel finished the session in sixth , one place behind McLaren 's Jenson Button . Wolff completes 20 laps with a fastest lap of one minute 40 seconds . The 31-year - old finishes just 0.227 seconds behind main Williams driver Felipe Massa .
The development driver impresses finishing 15th out of 22 drivers . Wolff completes 20 laps with a fastest lap of one minute 40 seconds . The 31-year - old finishes just 0.227 seconds behind main Williams driver Felipe Massa .