27-year-old Dhawan, who clobbered 30 boundaries and seven sixes in his superlative knock, became the second highest individual scorer in the history of List A games (limited overs matches) behind former England and Surrey batsman Alistair Brown.
Brown had scored 268 for Surrey against Glamorgan at Oval back on July 19, 2002.
If Dhawan's first 100 came off only 86 balls, the second hundred came off only 46 balls as he raced to his first List A double hundred in only 132 balls with a push off left-arm seamer Beuran Hendricks' bowling at the LC de Villiers Oval.
On personal best of 220, Dhawan created a national record by surpassing Sehwag's best of 219 in an one-dayer against West Indies at Indore back in 2011.
Just when it looked that he would eclipse the world record, he was caught by wicketkeeper Dane Vilas of Rusty Theron's bowling trying another slog shot. Dhawan added 285 runs in only 33.5 overs with his skipper Cheteshwar Pujara, who also scored a century.
Dhawan made a memorable Test debut against Australia earlier this year with a brilliant 187 and has not looked back since then as he became the best batsman in India's victorious Champions Trophy campaign recently.
