Thanks for joining us... plenty more action to come in qualifying, coming up in about two hours time. See you then!
Free Practice 3
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Rosberg, Sutil and Buemi round off the top 10.
Hamilton takes fourth with Alonso in fifth, Massa sixth and di Resta in seventh.
So, a late show by Vettel sees the world champion top the timesheets in FP3, with Button second and Webber third.
But it's Vettel who clocks a 1m24.824s to pace the session!
The flag comes down and are we to see Button deposed? Webber looks the most likely.
Vettel should be able to squeeze one final lap in as he crosses the line with 30 seconds left.
Force India's Di Resta is seventh... well done that man!
Button flies round in 1m25.191s to improve at the top of the timesheets again as Vettel goes second.
Everyone's out there on a crowded track as this session draws to a close... just Ricciardo and Buemi abstaining at the moment.
Alonso now is the man to beat after the Spaniard puts in a 1m25.784s!
Hamilton claims fourth on his first flyer on softs as Vettel re-emerges from the pits....
Six minutes left and Massa goes quickest... but his stay at the top of the timesheets is a brief one as Button puts in a 1m25.942s to go top.
Alonso now with a 1m26.387s to slot in behind Vettel in second.
Still Vettel's best time is the one to beat today...
Button heads out on softer tyres with just under 10 minutes of the session remaining.
More on Grosjean's promotion for the final two races of the season: Team boss Eric Boullier says it is an "appropriate time" for the the Frenchman to "put his skills to the test".
Hamilton puts in just one flyer on hard tyres before returning to the McLaren garage.
Hamilton's down in 12th at the moment, but the McLaren man is improving.
And then the Australian puts in a 1m26.466s to go second behind his Red Bull team-mate Vettel.
Webber, with hard compound tyres on his Red Bull, surges into third with a lap of 1m26.892s.
So, the top four are Vettel, Rosberg, Schumacher and Button with 20 minutes remaining in this third and final practice session ahead of Sunday's Indian Grand Prix.
Breaking news: Romain Grosjean will drive for Renault in first practice at the final two races of the season...
But here's Rosberg doing his best to crash the party with a 1m26.873s to go second.
Hamilton usurps Alonso from fifth place, and it's now Vettel, Schumacher, Button, Webber and Hamilton in the top five.
Massa's front wing is wobbling somewhat as he approaches Turn 4... that'll be something that needs addressing back in the garage.
Pirelli on Twitter: "This work on the hard tyre is very important as the teams are almost sure to use it to get through Q1 this afternoon."
Button moves up to third... Hamilton in sixth now.
All of a sudden the top five takes on a rather familiar look. Just Button and Hamilton missing.
Force India on Twitter: "Paul (Di Resta) and Adrian (Sutil) are currently running the option tyres, which is the hard compound. Longish runs underway."
Pirelli on Twitter: "More drivers coming out now; expect to see them on the hard tyre first and then onto the soft."
Schumacher's back out on track, about to add to the six laps he put in previously.
Vettel betters his time but Webber responds with a 1m28.008s to close the gap.
The BBC are reporting that drivers have been told to stay in their cars if they go off because of vipers lurking in grass.
Here's Vettel, the world champion taking over at the top of the timesheets with a 1m28.347s.
Perez looks good until he oversteers at the penultimate corner... he's still third quickest today.
The F1 circus is in town, but so too are rock legends Metallica. Unfortunately, they've had to cancel their gig though.
Alguersuari laps at 1m30.010s to go second fastest but soon it's Webber who tops the timesheets with a lap of 1m29.384s.
Perez shunts Senna back into third as Karthikeyan has a minor spin on the final corner.
Schumacher raises the bar again with a 1m29.908s as Senna slots into second place.
Schumacher's second flying lap sees an improvement to 1m30.948s, as Rowan Atkinson is seen chatting to Lewis Hamilton in the pits. Can you imagine Mr Bean in an F1 car?
Perez and then Karthikeyan also post times, slotting in behind early pacesetter Schumacher.
Here it is: the first benchmark time of the day, a 1m31.768s from Schumacher.
And it's Schumacher who crosses the line first to start a timed lap...
A roar from the Mercedes garage signals the end of the brief lull in proceedings with Schumacher getting back out onto the track.
Alonso is out of his Ferrari cockpit and doesn't seem to be in any rush to get back out on track.
Seven minutes into the session and the track is empty for the time being.
Vettel, Massa, Webber and finally Button are out on their respective garages and checking over their cars.
The Lotus and HRT teams have reportedly been having problems with the drainage systems in their hotels, with sewage bubbling up in sinks... one journalist says a team member told him "We are eating our own s***!".
Out goes Hamilton to join the early runners for his first action of the day.
Jaime Alguersuari has the honour of being first out on track today at a hazy New Delhi.
Here we go then! We are green and the final practice session is under way!
Jenson Button's been having a few problems getting to the track today: "Morning from a sunny New Delhi.. On the way to the circuit and it feels like Practice 3 has already started!!! #tuktukracing!"
It was then Ferrari's Felipe Massa's turn to lead the pack in yesterday's second practice, as Formula One's oldest team set the pace at the sport's newest circuit.
Lewis Hamilton paced the first practice session, but was penalised for setting his best lap under a yellow flag.
So, pole position for the first ever Indian Grand Prix will be up for grabs later - but first another hour for the teams to test their cars and systems before qualifying.
Hello and welcome back to our coverage of the action from the Indian Grand Prix. Saturday's practice session will be getting under way later on, so be sure to join us again then.