McLaren's Lewis Hamilton proved the fastest driver on the Interlagos track during the first free practice session for the Brazilian Grand Prix.
It was a closely fought battle between Hamilton and the two Red Bulls with the Mercedes-bound driver finishing just 0.009seconds ahead of championship leader Sebastian Vettel with Mark Webber third.
Jenson Button clocked the fourth-fastest time of the morning with championship challenger Fernando Alonso completing the top five.
Just over 15 minutes into the session, Hamilton crossed the line in a time of 1:14.131 as he and the rest of the team tested a set of 2013 Pirelli tyres and it was not to be beaten as Vettel got closest to him approaching the half-hour mark.
Alonso will be hoping his Ferrari team-mate Felipe Massa can have another big weekend and the Brazilian managed the sixth-fastest time of the morning before spinning at Pinheirhino, which resulted in a yellow flag.
Romain Grosjean was seventh in the Lotus with Paul Di Resta taking eighth for Force India, just ahead of Pastor Maldonado's Williams.
Nico Hulkenberg completed the top ten for Force India.
It was a frustrating session for Kimi Raikkonen as he battled with a engine problem.
Brazilian Grand Prix - Practice 1 Results:
Pos Driver Team Time Laps
1. Lewis Hamilton McLaren-Mercedes 1m14.131s 33
2. Sebastian Vettel Red Bull-Renault 1m14.140s + 0.009 35
3. Mark Webber Red Bull-Renault 1m14.198s + 0.067 34
4. Jenson Button McLaren-Mercedes 1m14.217s + 0.086 31
5. Fernando Alonso Ferrari 1m14.392s + 0.261 28
6. Felipe Massa Ferrari 1m14.716s + 0.585 29
7. Romain Grosjean Lotus-Renault 1m14.719s + 0.588 33
8. Paul di Resta Force India-Mercedes 1m14.738s + 0.607 34
9. Pastor Maldonado Williams-Renault 1m15.015s + 0.884 37
10. Nico Hulkenberg Force India-Mercedes 1m15.050s + 0.919 32
11. Michael Schumacher Mercedes 1m15.114s + 0.983 36
12. Kamui Kobayashi Sauber-Ferrari 1m15.255s + 1.124 31
13. Sergio Perez Sauber-Ferrari 1m15.396s + 1.265 32
14. Valtteri Bottas Williams-Renault 1m15.413s + 1.282 23
15. Daniel Ricciardo Toro Rosso-Ferrari 1m15.587s + 1.456 35
16. Kimi Raikkonen Lotus-Renault 1m15.701s + 1.570 16
17. Jean-Eric Vergne Toro Rosso-Ferrari 1m16.048s + 1.917 35
18. Nico Rosberg Mercedes 1m16.315s + 2.184 36
19. Giedo van der Garde Caterham-Renault 1m16.460s + 2.329 32
20. Timo Glock Marussia-Cosworth 1m16.506s + 2.375 31
21. Vitaly Petrov Caterham-Renault 1m16.617s + 2.486 30
22. Charles Pic Marussia-Cosworth 1m17.234s + 3.103 26
23. Pedro de la Rosa HRT-Cosworth 1m17.678s + 3.547 15
24. Narain Karthikeyan HRT-Cosworth 1m17.895s + 3.764 13