2007 World Cup and aftermath

Following his good performance, Ganguly was named in the squad for the 2007 Cricket World Cup. He was the leading scorer for India in their first round defeat against Bangladesh. After India were knocked out of the tournament in the group stage, there were reports of a rift between certain members of the Indian team and their coach Greg Chappell. Ganguly, allegedly, ignored instructions from the team management to score quickly. After Sachin Tendulkar issued a statement saying that what hurt the team most was that "the coach has questioned our attitude", Chappell decided not to renew his contract with the Indian team.

On 12 December 2007, Ganguly scored his maiden double century of his career while playing against Pakistan in the first innings of the third and final test match of the series. He was involved in a 300 run partnership for the 5th wicket along with Yuvraj Singh - a much needed partnership that saved India which was struggling at 61 for the fall of four wickets. He later went on to score 239 before being dismissed by Danish Kaneria.

On 18 April 2008, Ganguly led the Kolkata Knight Riders team owned by Shah Rukh Khan in the IPL Twenty20 cricket match to a 140 run victory over Bangalore Royal Challengers led by Rahul Dravid and owned by Vijay Mallya. Ganguly opened the innings with Brendan McCullum and scored 10 runs while his partner Brendan McCullum remained unbeaten blasting his way to a record 158* runs in 73 balls. On 1 May in a game between the Knight Riders and the Rajasthan Royals, Ganguly made his highest score of the season and his second T20 half century, scoring 51 runs off of 39 balls at a strike rate of 130.76. In his innings, Ganguly hit four 4s and two sixes, topping the scorers list for the Knight Riders.

Ganguly has been prolific in both Test and ODI cricket in the year 2007. He scored 1106 Test runs at an average of 61.44 (with three centuries and four fifties) in 2007 to become the second highest rungetter in Test matches of that year after Jacques Kallis. He is the fifth highest rungetter in 2007 in ODIs, where he scored 1240 runs at 44.28.