South Korea-born New Zealander Lydia Ko became the youngest world number one in golf history by reaching the top of the women's rankings aged 17. Ko secured the number one ranking by finishing in a tie for second at the LPGA Coates Championship in Florida.
Sachin Tendulkar is the cricketer who scored 1st double century in the history of one day international cricket.
What has been the date of this great moment ?
