Hamilton and Mercedes lead the way in FP1 at Red Bull Ring

Lewis Hamilton successfully put Mercedes' updated W09 through its paces Friday morning at the Red Bull Ring, outrunning team mate Valtteri Bottas to clock in fastest in the free practice session.

Hamilton concluded his morning run with a lap in 1m04.839s on Pirelli's ultrasoft tyres that edged out Bottas by 0.127s, with Red Bull's Max Verstappen in third, 0.233s behind. Ferrari's Sebastian Vettel, Daniel Ricciardo and Kimi Raikkonen completed the top six.

Austrian Grand Prix - Free Practice 1

The Red Bull Ring was spared the Styrian mountains' rainy clouds that prevailed yesterday but the skies still appeared menacing as the first free practice session of the weekend got underway.

As scheduled, Robert Kubica was back in the Williams, undertaking his second FP1 of the season as he slot into Sergey Sirotkin's car.

The Polish driver's task was to focus exclusively on development work however, with outright speed a very secondary concern.

McLaren's drivers were among the first to hit the track, the Woking-based outfit running aero rakes on its MCL33 as it tests various set-up changes in an attempt to improve the car's rather depressing form.

On the development front, everyone will also be attentive to the impact of Mercedes' updates here in Austria as the German team attempts to build itself a margin over its fellow front-running rivals.

Hamilton jumped to the of the leaderboard shortly after taking to the track with a 1.05.825s lap that just edged out team mate Bottas, but the Finn responded by going faster by 0.144s, an effort immediately bettered once again by the four-time world champion.

As Red Bull ramped up its speed, Max Verstappen took a trip off the road at Turn 4, putting two wheels in the gravel and suffering a quick spin, fortunately without any damage.

Damage was incurred at McLaren however, with Stoffel Vandoorne breaking his front wing after hitting a kerb. The Belgian's morning was a complicated one as he was also summoned to the Stewards post-session for an "unsafe release" investigation involving Sebastian Vettel.

An hour into the session, Verstappen, Vettel and Ricciardo all picked up the pace but without overrunning the Silver Arrows squad.

In addition to its good balance, Mercedes' W09 was also the fastest car in a straight line, with Bottas clocked at 318.2 km/h as he rocketed around the Styrian valley.

Hamilton and Bottas remained at the top of the timesheet in the closing stages of the session as everyone focused on long runs.

Haas' Romain Grosjean concluded FP1 as 'best of the rest', right in front of Force India's Esteban Ocon, while Charles Leclerc once again put in an impressive performance with the ninth best time.

Fellow rookie Pierre Gasly rounded off the top ten for Toro Rosso.

Despite Mercedes' advantage at the very front, the spread between the front-runners was relatively tight with a little over half a second between the top 5.

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