That's it, then. Grosjean pops up late on to set the fastest time. He leads from Hamilton, Vettel, Webber, Rosberg, Raikkonen, Di Resta, Button, Maldonado & Perez. Thanks for joining us for the first free practice. Make sure to join us again for the second session a little later on.
Free Practice 1
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Grosjean goes fastest with a minute to go. hamilton had been fastest for a while but the Lotus driver, on medium compound tyres, sets a time of 1:44.241.
Grosjean sets personal best times in the first and third sectors but his overall time only good enough for fifth. His team-mate Raikkonen a tenth of a second out in sixth.
Vettel much quicker than Hamilton on the first sector but not quite able to keep up that pace throughout the lap. Hamilton still the quickest driver with eight minutes to go.
Seb looking good now. The German clocks a lap that is just two-tenths from Hamilton's time. He looks to be getting quicker...
Lotus's Grosjean and Raikkonen emerge for their final stint - both on medium compound tyres. Can they challenge Hamilton's fastest lap?
Hamilton still leads this opening free practice session. Red Bull's Webber has gone second-fastest with Hamilton's team-mate Rosberg third.
Hulkenberg returns to the track after initially setting the 11th fastest time. The Sauber driver had reportedly been ill leading up to this weekend but should be fine to compete.
It seems to have worked... Hamilton goes quicker, setting a time of 1:44.433, leading from Webber, Rosberg, Vettel and Raikkonen.
Hamilton's team are on the radio to him. They let him know that Rosberg is currently gaining time on the middle sector and suggesting using less boost on turn one, instead using it coming out of the hairpin on turn seven.
Rosberg goes quickest for a very brief period of time but his team-mate Hamilton is faster. A very tidy lap from the Brit that sees him set a time of 1:44.462.
Vettel improves upon his initial fastest lap. The Red Bull man flies round in a time of 1:44.866.
Button is back in te pits and has a problem with his car. The Brit has had real trouble with grip so far, and the mechanics are now adjusting Button's set-up - possibly the ride height.
Surprise, surprise. The world champion takes a couple of laps to familiarise himself with the track and then sets the fastest lap. The German clocks a 1:45.172.
Williams' drivers Maldonado and Bottas return to the pits to discuss changes with their team. Hamilton appears to have made a slight mistake on his latest lap. The Brit looked to be making progress but set a 1:46.0.
Expect the times to start tumbling now. There are a number of drivers out and the track will improve lap-by-lap.
Raikkonen leaves the pits and will set his first time. He's currently behind Marussia's Gonzalez on the track who will surely be conscious of that.
Fernando Alonso takes to the track and will set his first timed lap of this session. Grosjean still fastest ahead of Perez, Button, Maldonado and Gutierrez.
Grosjean sets the fastest lap time of this opening practice. The Lotus driver pips Perez by the smallest of margins, clocking a 1:45.329. A very smart lap from the Frenchman on a relatively dusty track.
Maldonado goes quickest over the middle section but can't maintain the pace and sets a lap time that is 00.957 slower than Perez's lap.
A number of other drivers are out on the track now. Grosjean, Maldonado, Pic, Kovalainen and Bottas have all set their first times of the day, though none as quick as Perez's.
Button is on the radio to his team. "WOW! We really don't have any grip." The Brit is currently on the medium-compound tyres and clocks a time of 1:47.0.
Away from this FP session for a moment, all the talk surrounding this weekend's race is whether Ross Brawn will continue in his role for Mercedes beyond this season. Lewis hamilton has had his say. Read it here. (Web only)
Perez's McLaren team-mate Jenson Button joins him on the track. The Mexican improves upon his time, though only slightly. 1:45.3.
Huge improvement for Perez on his second lap as he clocks a 1:45.8. Still just the McLaren driver out on the track...
Perez does indeed set the day's first timed lap. The Mexican gets round in 1:48.5.
We've had half an hour of the first free practice and still no time set. Will McLaren's Perez be the first to do so?
Not a timed lap for the Marussia driver, then. Just more testing for the Venezuelan who makes his way back into the pits. Sergio Perez is out on the track.
Still just Gonzalez out there. As always, it looks like the 'big guns' are allowing others to make their way out first and clean the track.
Gonzalez finally reappears, but is on his own. The Marussia driver looks pacy on the track with overhead conditions perfect. Who'll follow him out next?
There are a number of fans gathered on the balcony of the Yas Viceroy hotel that hangs over the track of this wonderful circuit. They're not being treated to what they'd have hoped for yet - still nobody out on the track.
Still no times set as of yet. Webber is back in and there are currently no cars out on track. Are the drivers waiting for the track temperatures to reduce slightly?
Vettel is back in after his instalatin lap and is looking at complete ease. The German is currently having a sit down and is on his phone, while mark Webber is out on the track.
Most drivers have completed their installation lap now. Only Mark Webber is left to come out for his first run.
There's a fair bit of smoke coming out of the back of Jean-Eric Vergne's Torro Rosso. The Frenchman doesn't look too concerned, though, and will continue.
Rodolfo Gonzalez pilots Chilton's Marussia during this session, while Brit James Calado will drive for Force India.
Pastor Maldonado locks up on his opening lap, but it's not too much of an issue.
World Champion Vettel is out first for his initial lap. Both Lotus drivers are out there, too.
Lewis Hamilton secured pole here in 2009 and 2012 - though he retired in both races - and will fancy himself once more...
Good monrning and welcome to LIVE coverage of the first free practice session of the 2013 Abu Dhabi Grand Prix. Sebastian Vettel claimed his fourth Championship last weekend with a win in India and the German will look to claim another race victory here.