The delivery was invented by the Pakistani cricketer Saqlain Mushtaq.
A doosra is a particular type of delivery by an off-spin bowler in the sport of cricket. The doosra spins in the opposite direction to an off break (the off-spinner's default delivery) and aims to confuse the batsman into playing a poor shot.
A variety of bowlers have made considerable use of the doosra in international cricket. Other Pakistanis who use it include Shoaib Malik and Saeed Ajmal. Users from other nations include Sri Lankans Muttiah Muralitharan and Ajantha Mendis, Indian Harbhajan Singh and South African Johan Botha.