Robert Kubica seventh on F1 test return, Sebastian Vettel fastest

Kubica was taking part in his first run in a contemporary F1 car since his career was interrupted by a rallying crash six-and-a-half years ago.

His performance on Wednesday at the Hungaroring is considered to be crucial in determining whether he can return to F1 in 2018.

The Pole left the pits within minutes of the track action starting, completing a single installation lap before returning to the garage.

A second installation run followed before he completed his first timed lap of the day - a 1m24.299s on the super-softs.

He improved on each lap of the five-lap run before pitting with a best time of 1m22.701s.

Kubica improved on each of his next four runs, the latter of which lasted 11 laps and produced consistent laptimes, to drop down to 1m20.255s.

The Pole went fourth quickest on his seventh run, using the super-softs, leaving him 2.557s off the pace.

Two further runs followed, before a final 15-lap blast, where he lapped consistently in the low to mid-1m21s, just before lunch brought his morning lap tally to 74.

That was more than a race distance at the Hungaroring, albeit across 10 stints.

Vettel completed just over two hours of running before vacating the car as planned so Ferrari could make adjustments ahead of Kimi Raikkonen hitting the track in the final hour.

Vettel completed 40 laps during that period, clocking the fastest time of the morning with a 1m17.124s on the super-softs, 1.113s quicker than Raikkonen in third.

Lando Norris, who is driving for McLaren in Hungary as part of his prize for winning the 2016 McLaren Autosport BRDC Award, was second quickest, 0.770s off the pace on the ultra-softs.

Carlos Sainz Jr, also running the ultra-softs, was fourth, ahead of handing the car over to Toro Rosso team-mate Daniil Kvyat in the afternoon.

Mercedes DTM frontrunner Lucas Auer ran the ultra-softs to go fifth for Force India, two tenths ahead of GP3 racer George Russell, taking part in his second successive day of testing for Mercedes.

Red Bull's Pierre Gasly was eighth, with Formula 2 frontrunner Luca Ghiotto, who was driving a F1 car for the first time, ninth in the Williams ahead of Haas development driver Santino Ferrucci.

Honda F1 junior Nobuharu Matsushita, who won the sprint race in Hungary, propped up the timesheet in his maiden F1 testing outing with Sauber.

The session was red-flagged in the final seconds before lunch, with Norris failing to return to the pits.

Day two morning times