The dashing opener made 90 as India went to lunch on the fourth day at 2-230, an overall lead of 431. He shared 182 run stand with Gambir who scored a brilliant century.
However Sehwag missed out on a Test match century on his 30th birthday, when trying to run down a Peter Siddle delivery down to thirdman, he only managed a thin edge which was pouched by wicketkeeper Brad Haddin.
Sehwag's 90, which came off 122 balls, included eight boundaries; he will be kikcing himself that he couldn't make the most of the reprieve he was given earlier in the innings, when umpire Asad Rauf turned down an appeal for a catch behind the stumps, when it was obvious that he had nicked the ball.
Sehwag, then on 88, could only add two more runs before his dismissal.
His innings, and the 182-run stand he put together with Gambhir, means India are firmly in control of the match. For all those statistics freaks, this was only the second time in Test career that the Delhi dasher had been dismissed in the nineties.
Sehwag, Gambir bat Australia out of second test