Hamilton 'in league of his own' after Aussie blitz

Melbourne : Lewis Hamilton was hailed as being "in a league of his own" on Friday as he burned off his rivals in the year's opening practice sessions at the Australian Grand Prix.

The triple world champion bossed the field and held a half-second gap over Ferrari's Sebastian Vettel and his new Mercedes team-mate Valtteri Bottas in the afternoon session.

Britain's Hamilton followed up his field-leading fastest lap of 1 minute, 24.220 secs in the morning run with a blistering 1:23.620 in the late afternoon.

It was around one-tenth of a second off Vettel's circuit record of 1:23.529, posted for Red Bull in qualifying ahead of his 2011 race victory.

"Hamilton is in a league of his own at the moment," Mercedes team boss Toto Wolff said.

"His one-lap pace was really good and he took the ultrasofts for 17 laps and was stable. I'm happy."

Ferrari were expected to press Hamilton and the Mercedes team after superior times in pre-season testing, but on the evidence of the opening two sessions Hamilton is again the driver to beat in Sunday's season-opener.

"I'm super-happy to be back in the car, particularly after a first day like that. It was 99 percent perfect," Hamilton said.

"We've shown good form so far on both the long and short runs and we got every lap done that we wanted to. The tyres performed really well today too.

"I'll be pushing as hard as I can to win this race."

Hamilton's time was more than three seconds faster than his best lap in last year's corresponding free practice in Melbourne.

Finland's Bottas slotted smoothly into the Mercedes team environment with a best lap of 1:24.176.

"I definitely feel like I can make a step forward tomorrow. It'll be a busy evening for us looking through all the data to see where we can improve, but it's a reasonable start," Bottas said.