When I saw this article, I couldnt help but think about the person who was the king, in regard to this context. SM Gavaskar has been remained unbeaten throughout the day on 11 different occasions. In fact in his 4th test (the one in which he scored century and double century), he was unbeaten on the 1st and the 5th day(the match was extended for 6th day). Since he was an opener, when India batted first and he scored a century, there is a very good chance that he would have been unbeaten at the end of day. Out of the 23 centuries that he scored in the first inning, India batted first on 10 of those occasion, and he was unbeaten at the end of 5 those days.
