Red Bull driver Sebastian Vettel has set the fastest time during first practice for the Brazilian Grand Prix at Interlagos, clocking in at one minute 12.328.
Vettel - who is 25 points behind the championship leader, Ferrari’s Fernando Alonso - set the fastest time, 0.482 seconds ahead of team-mate Mark Webber.
Australian Webber – who is himself just 11 points behind Alonso - was some 0.035secs ahead of McLaren’s Lewis Hamilton.
Hamilton’s team-mate, defending Formula 1 champion Jenson Button, was fourth, with Alonso only 13th.
Alonso’s practice was disrupted when the Spaniard’s car stopped out on the track towards the end of the session.
Ferrari had earlier said the engine in the car was at the end of its life and the failure happened two laps earlier than expected.
However, the incident should not prove detrimental to the Ferrari driver’s qualification prospects tomorrow, with the team planning to change Alonso’s engine between first and second practice, which starts at 16:00 GMT.
Renault’s Robert Kubica was the first serious contender to take to the track, setting a lap of one minute 13.462 seconds after 50 minutes of the 90-minute session.
Webber was the first to beat Kubica, with a 1:13.168, before Hamilton dipped underneath that with a 1:13.138.
Vettel then dipped below the 73-second barrier with a 1:12.946, Hamilton beat that with a 1:12.845 before the German knocked half a second off that with a 1:12.351.
Kubica ended up fifth, ahead of Mercedes driver Nico Rosberg, whose team-mate Michael Schumacher was eighth behind the Williams driver Rubens Barrichello.
Also in Brazil this week, World Mobi launched its new city guide to Rio de Janeiro.
World Mobi offers the most comprehensive mobile travel guides available, with over 800 cities in 200 countries listed. Each is developed by the World Mobi team to combine into a single global travel directory.
Rio.Mobi is the latest in this illustrious line up, offering click to call functionality – which means no scribbling down telephone numbers.
Most entries are also linked to websites where users can quickly access more detailed information if needed.
Other key features include information on accommodation, restaurants, attractions, entertainment, nightlife, shopping, and transport.
City.Mobi guides include user reviews and traveller utilities such as a translation guide, currency converter, news and local weather guide.