McLaren driver Jenson Button set the fastest time on a wet and inconclusive day of practice Friday for Formula One's season-opening Australian Grand Prix, with all teams prevented from showing their true pace.
Button set the best time in opening practice, just ahead of teammate Lewis Hamilton, and an afternoon downpour meant the second-session times were a couple of seconds off those set earlier.
In the second practice session, Mercedes' Michael Schumacher was fastest, 0.10 seconds ahead of Force India's Nico Hulkenberg.
Rain also affected the opening session, and dry-tire running was only possible in the final half hour. Button's best time of 1 minute, 27.560 seconds was 4 seconds off Sebastian Vettel's pole time in 2011.
''Even though it doesn't mean too much, it's always nice to start the season with the quickest time of the day,'' Button said.
The opening session should prove a better guide to how teams will perform in Saturday's qualifying session.
''Our car feels there o...