Fernando Alonso produced the quickest individual lap time but Lewis Hamilton had the fastest three combined sectors during practice in Canada.
Mercedes team principal Ross Brawn admitted it was his decision to do the three-day test for Pirelli which his team are under investigation for by the FIA.
Team principals are trying to find a way to reintroduce in-sesaon testing following a discussion involved six teams at the Monaco Grand Prix.
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Fernando Alonso pipped Lewis Hamilton to the fastest time in the second practice session by 12 thousandths of a second.
Follow the 2013 Canadian Grand Prix second practice session on F1 Fanatic Live.
Paul di Resta ended the first practice session for the Canadian Grand Prix on top for Force India.
Follow the 2013 Canadian Grand Prix first practice session on F1 Fanatic Live.
In the round-up: Hamilton vows to “pull my socks up” ?σΤιΌ?σ Mercedes deny Rosberg revealed test to Vettel ?σΤιΌ?σ Raikkonen still blames Perez for crash