"This is a very special hundred for me as it saved the game for India, after scoring 115 in the second innings in Ahmedabad [ Images ] on Monday.
"I am happy to score the first 100. Now, I know how it feels to get a century," Harbhajan said.
Giving credit to Laxman for helping him get to his century, Harbhajan said, "If he was not on the other side, things could have been different."
"Laxman was the "sankatmochan" (saviour) of the match and I was just supporting him," Harbhajan added.
"He was all the time advising me during our stay at the crease and that helped a lot, Harbhajan said.
The pair shared a 163-run stand for the seventh wicket.
He further said that he never thought of scoring so many runs for India in a Test match and it was very special receiving the Man-of-the-Match award for scoring runs rather than taking wickets.
Harbhajan said he did not receive instructions from the Indian dressing room during the match but, before the start of the day's play, coach Gary Kirsten had told him to play his natural game and be careful in picking the shots.
It was important that India batted the first session of the day without losing a wicket, and once they managed to do that, it set the tempo for them.
Though he was delighted to have received the Man-of-the-Match award, Harbhajan felt that Chris Martin deserved it for taking five wickets on such a flat pitch.
He also praised young debutante New Zealand batsman Kane Williams and said that he was a promising cricketer and has shown good temperament.
In a reply to a question on the Umpire Decision Review System (UDRS), Harbhajan said that he was not against it and would not mind if that system came into play.