Twenty20 International records may be found at Twenty20 International Records. This list is based on the records of T20 international cricket. Except for "team wins, losses, and draws" and "highest wicket partnerships," the top five to seven records in each category are listed. These categories are described in more detail below. The most runs scored in an innings by a player who has been dismissed for a duck is 250, set by AB de Villiers in 2013. The most wickets taken by a player who has been dismissed for a duck is three, achieved by Shane Warne in 2001. The fastest century in a twenty20 international is 100 balls by David Miller in 2017. The best batting average in an innings of fifty or more is 100 by Andrew Symonds in 2007. The highest score chased is 170 runs by Australia vs South Africa at Melbourne Cricket Ground, Melbourne in 2015. The most sixes hit in an over is two; it was done twice by Shahid Afridi in 2009. The record holder for the most fours hit in an over is two; it was done twice by Shahid Afridi in 2009. These records are kept regularly by the official scorer of the game. They are known as "world records." A world record is a result that has been officially certified by at least one national cricket authority.