Fastest 50 in Twenty20 cricket?

Question

Australia’s David Warner scored the second fastest 50 in Twenty20 cricket against the West Indies this February, off just 18 balls, but what was the fastest 50 in this format of the game?

Answer 1

The fastest 50 in Twenty20 cricket was made by Yuvraj Singh against England in 2007. The batsman reached his half-century off just 12 balls.