Welcome to coverage of first practice for the Italian Grand Prix at Monza.

Button then tops the opening practice session for the Italian Grand Prix at Monza followed by Sebastian Vettel and Lewis Hamilton.

There may be some front wing damage, but it's nothing serious.

Rosberg off at the first chicane and hits one of the polystyrene marker boards.

The chequered flag comes out. Liuzzi goes P7 with 1:24.512.

Vettel tries again but is still two and a half tenths out. Di Grassi another driver to leave the tarmac but rejoin without visibly damaging the car.

No change at the top, with Button's 1:23.693 still the benchmark.

Tonio Liuzzi runs off track and negotiates his way back on to it via the grass.

Vettel out on track. Can he overhaul Button?

Rosberg fifth with 1:24.129 - including the fastest first sector.

The Ferraris working on a long stint on the hard tyre rather than fast laps. Alonso and Massa stand seventh and eighth.

The marshals out quickly to wheel the car away from the exit of the first chicane.

Yellow flags out as Senna is stationary on the edge of the track.

All 24 drivers have set a time with 20 minutes left in the session. Webber up to sixth.

Alguersuari off at Parabolica and into the gravel. He makes it back on track and brings her into the pits.

Button's mark still leads the way from Vattel, Hamilton, Kubica and Rosberg. Webber down in 12th.

And soon after the Scot moves up another place. Jarno Trulli's Lotus will be ready shortly.

Di Resta takes it from him though.

Schumacher jumps to eighth with 1:25.200, a marked improvement.

Bruno Senna's HRT is finally ready to 'install' but the Lotuses are still not ready.

Schumacher with a run off the track. Hamilton third.