Hockenheim, Germany: Jenson Button drove the fastest lap in the first practice session for the German Grand Prix on Friday, ahead of McLaren teammate Lewis Hamilton.
Hamilton will be driving in his 100th Formula One grand prix on Sunday.
With light rain hitting the circuit on and off, Button set the pace with a lap of 1 minute, 16.595 seconds - edging Hamilton by .498 seconds.
Championship leader Fernando Alonso was third in a Ferrari, ahead of Michael Schumacher in a Mercedes.
A second practice session is scheduled for Friday afternoon.