Alzain Tareq's age was just 10 years at the time when she participated in the 2015 FINA World Swimming Championships in Kazan, Russia, and she was one of the youngest competitors that one would notice at the championships. While Guinness World Records states that Alzain Tareq is the youngest female competitor in the history of the championships.
Tareq competed in the women’s 50m butterfly on August 7, 2015 and even though she was only 10, she was sharing the stage with swimmers from around the world.