<span class=normal> Even though the entire spotlight will be on the super perfectionist Aamir Khan, reports have it that Abhishek Bachchan is leaving no stone unturned to leave a mark in this film. Thats why, when asked about his preparations for the film, Abhishek said that he is presently concentrating entirely on Dhoom 3 only. He also added that there is some extensive physical training thats required as action films are physically demanding and ones body needs to be conditioned for that. Needless to say that, Jr. Bachchan is walking that extra mile to condition him for the role. At the same time, Abhi also went on record to say that he feels that that Aamir will give his career-best performance in the film. </span>