Heikki Kovalainen from McLaren- Mercedes put in an impressive drive as he finished quickest in Friday's free practice session at the Hungarian Formula One Grand Prix. The Finn registered a time of 1 minute 22.278 seconds for the 4.381-kilometre Hungaroring circuit to pip Nico Rosberg of Williams to top spot by 0.059 seconds. Defending world champion Lewis Hamilton was third fastest in the second McLaren, followed by German GP winner Mark Webber in a Red Bull. Championship leader Jenson Button of Brawn GP was 10th and teammate Rubens Barrichello 13th while Red Bull's Sebastian Vettel finished down in 15th after struggling for grip during the session. Button led the standings after nine races with 68 points. Vettel sits second with 47, Webber has 45.5 followed by Barrichello with 44 points. 