Hamilton and Button optimistic

Lewis Hamilton is predicting a "tight race" in Sunday's Canadian Grand Prix after setting the fastest time in both practice sessions at the Circuit Gilles Villeneuve, as his McLaren team-mate Jenson Button missed much of the day's running due to an oil leak which meant mechanics had to change his clutch and gearbox.

Button praises his team for working "flat out" to get him back on track for the final 18 minutes of the second session, and believes he can "can still have a good weekend" after the problems.

Hamilton will be seeking to secure fourth pole position at the track during Saturday's qualifying session, the scene of his maiden grand prix win in 2007.

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