5. 44* against Australia in 2012, Adelaide:
None would forget the six he smashed at Adelaide. Batting first, Australia compiled a defendable 8-269 from their 50 overs, thanks largely to a 98-run partnership from Peter Forrest and David Hussey.
In reply, Gambhir made a majestic 92 to have the visitors on track for victory, but a steady bowling performance by the Aussies kept the game in the balance. And it came down to 13 runs required from the final over, with Clint McKay taking on the master Dhoni.
The Indian skipper, who hadn’t hit a boundary in creeping to 33 from 55 balls before the final over, dispatched the third delivery onto the famous Adelaide Oval hill, one of the biggest sixes ever hit at the venue, and then secured the win with two balls to spare.