Gambhir, who is the leading scorer in the ongoing series, notched up an unbeaten 149 and steadied the Indian innings along with Sachin Tendulkar and VVS Laxman after the hosts had lost a couple of early wickets.
''I think I made my debut against Australia. It was not a very good experience for me. I wanted to prove myself against a team like Australia,'' Gambhir told reporters after the end of the day's play.
''Australia are a world champion team and it is a dream come true for me go get a big hundred against them,'' he added.
''There was a lot of pressure on me. I needed a big hundred.'' When asked to compare his century during the previous Test at Mohali to the one here Gambhir said,''there is difference between the two innings. We lost two quick wickets and it was important to stay at the wicket and steady the innings. I was concentrating on that. The pressure was more than at Mohali.'' The 27-year-old left-hander praised the way Brett Lee and Stuart Clark bowled, specially with the second new ball.
''It is never easy to bat against a team like Australia. The way Lee and Stuart was bowling, it was dificult to get runs,'' he said.
''It was important to maintain concentration and bat on.'' Revealing the secret behind his current good form Gambhir said, ''I did not take any pressure despite playing on my home ground unlike the last time I played here against Sri Lanka.'' Gambhir also felt that the pitch, although a bit flat at the momment, will assist the spinners from the third day onwards.
''The bounce is pretty even early on. From the third or fourth day it may start breaking and the bounce can be a bit uneven,'' he opined. ''The spinners will play a major role on this track.
''We have to get enough runs on board so that our bowlers, specially the spinners, can start doing their job.'' When asked about his onfield confrontations with some of the Australian players, he said,''they were desperate to get me out and were trying to break my concentration by getting in face. But I just tried to maintain my concentration and bat on.''