Red Bull dominate FP3

German Vettel, 23, who can become the youngest champion if results go his way in Sunday's closing Abu Dhabi Grand Prix, lapped the Yas Marina circuit in one minute 40.696 seconds with Australian Webber 0.133 slower.

McLaren's Lewis Hamilton, who remains in the four-way title battle by the skin of his teeth, was third fastest - but 0.584 slower than Vettel - with championship leader Fernando Alonso fourth for Ferrari.

Spaniard Alonso, who is hoping to become the sport's youngest triple champion at the age of 29, leads Webber by eight points and Vettel by 15. Hamilton is 24 off the pace with 25 remaining to be won.

Hamilton and Alonso were unhappy team mates at McLaren in 2007, with the Briton picking up more enemies in Spain when he won the title the following year, but they have patched up matters since.

Alonso, who would be happy to see anyone take points off the Red Bull pairing who are expected to be strong in the season-ender and finished one-two in Abu Dhabi last year, has even said he would like to see Hamilton on pole.

"Red Bull are still favourites and hopefully McLaren can do a good job here and be on pole but I guess Red Bull were not 100 per cent," he said after Hamilton was fastest in Friday practice.

Alonso was watched by Ferrari president Luca di Montezemolo, who also visited the Mercedes garage to greet former seven-times champion Michael Schumacher.