CLICK HERE for full FP1 times.

Nico Rosberg set the fastest time of the first free practice session for the Austrian Grand Prix, beating Lewis Hamilton by 0.140s.

On F1's return to Austria, Rosberg set a time of 1:11.295 to edge out his team-mate as the field was more closely matched around the 4.3km circuit. Fernando Alonso was third quickest - just 0.3s off Rosberg - with Felipe Massa also within half a second of the Mercedes.

Jenson Button was fifth fastest having topped the timesheets for a while in the middle of the session, with McLaren testing a number of new parts on the MP4-29. He ended the session 0.544s slower than Rosberg and 0.15s ahead of the two Force India's, with Sergio Perez ahead of Nico Hulkenberg.

The top ten was rounded out by Valtteri Bottas, Kevin Magnussen and Jean-Eric Vergne, while Kimi Raikkonen was 11th fastest having been running a titanium plate on the bottom of his car in order to create more sparks. Rosberg was doing similar in his Mercedes - albeit with the plates located in different places to Raikkonen - in an attempt to make the cars more visually spectacular.

The two Red Bulls of Daniel Ricciardo and Sebastian Vettel struggled somewhat in the opening session, ended FP1 13th and 15th respectively at the team's home circuit.

Teams were greeted with tricky conditions as cool temperatures were added to by light rain at times during the session, leading to a number of off-track excursions at Turn 1 especially. While the first corner has a large run-off area, other corners are not so forgiving and Massa ran wide in to the gravel at Turn 3 before Pastor Maldonado followed suit, just keeping his Lotus out of the tyre barrier.

With spots of rain falling halfway through the session, Vettel ran wide out of the final corner and lost control of his Red Bull, spinning along the grass on the pit straight within inches of the barrier. However, after two complete 360-degree spins he was able to regain control and get back to the pits safely. Shortly afterwards, Ricciardo followed suit but managed to catch the car before it was pitched in to a spin.

A broken hose was causing problems for Adrian Sutil as his turbo would not work properly, with the issue ending his session after just nine laps. He fared slightly better than Marcus Ericsson, however, who had completed eight laps in his Caterham before having to stop the car at Turn 1 and jump clear.