Lewis Hamilton refused to step down from P1 as the 2008 world champion posted the fastest time during the second free practice session of the 2012 Canadian Grand Prix weekend.
The Briton set his laptime almost halfway into the session putting him 0.054s clear of Fernando Alonso.
Felipe Massa’s improved form continues after the Brazilian went 3rd fastest, ahead of world champion Sebastian Vettel and Force India driver Paul Di Resta.
Kamui Kobayashi was the fastest of the Sauber pair, the Japanese clocked a 1:15.651, enough to put him in 6th, with Michael Schumacher and Nico Hulkenbgerg right behind him in 7th and 8th respectively.
Another low-key session from Jenson Button, the Briton settled for 9th with win-contender Nico Rosberg wrapping up the top 10.
1. Lewis Hamilton McLaren-Mercedes 1m15.259s 2. Fernando Alonso Ferrari 1m15.313s + 0.054 3. Felipe Massa Ferrari 1m15.410s + 0.151 4. Sebastian Vettel Red Bull-Renault 1m15.531s + 0.272 5. Paul di Resta Force India-Mercedes 1m15.544s + 0.285 6. Kamui Kobayashi Sauber-Ferrari 1m15.651s + 0.392 7. Michael Schumacher Mercedes 1m15.697s + 0.438 8. Nico Hulkenberg Force India-Mercedes 1m15.799s + 0.540 9. Jenson Button McLaren-Mercedes 1m15.812s + 0.553 10. Nico Rosberg Mercedes 1m15.878s + 0.619 11. Sergio Perez Sauber-Ferrari 1m15.898s + 0.639 12. Mark Webber Red Bull-Renault 1m15.907s + 0.648 13. Pastor Maldonado Williams-Renault 1m15.987s + 0.728 14. Romain Grosjean Lotus-Renault 1m16.360s + 1.101 15. Kimi Raikkonen Lotus-Renault 1m16.562s + 1.303 16. Heikki Kovalainen Caterham-Renault 1m16.981s + 1.722 17. Bruno Senna Williams-Renault 1m17.022s + 1.763 18. Vitaly Petrov Caterham-Renault 1m17.075s + 1.816 19. Jean-Eric Vergne Toro Rosso-Ferrari 1m17.124s + 1.865 20. Daniel Ricciardo Toro Rosso-Ferrari 1m17.716s + 2.457 21. Pedro de la Rosa HRT-Cosworth 1m18.908s + 3.649 22. Timo Glock Marussia-Cosworth 1m19.084s + 3.825 23. Narain Karthikeyan HRT-Cosworth 1m19.378s + 4.119 24. Charles Pic Marussia-Cosworth 1m19.902s + 4.643