Tendulkar's 24th attempt to secure his 100th international century attracted a bumper crowd to one of cricket's most picturesque venues on the Australia Day holiday but he had made just 25 runs when Siddle struck for the first time.
The ever-willing Australian quick's full delivery drew Tendulkar forward and the ball flashed off the bat to allow Ponting to take a low catch at second slip.
Siddle struck again in his next over to remove Gambhir for 34 with a brutish bouncer that came off the batsman's bat and shoulder before looping into the air for a diving Mike Hussey to catch.
Laxman, once the nemesis of Australian bowling, lasted until just before lunch before he suffered yet another failure on the tour when Nathan Lyon induced him into edging the ball through to wicketkeeper Brad Haddin for 18.
In Image: Aussies celebrate Sachin's wicket