After doing the post on players on the WTA tour who have been ranked No. 1, the question comes to mind about the same set of players on the ATP tour.
There aren't as many such players, but their pedigree far eclipses the women.
It is not just the troika of Roger Federer, Rafael Nadal and Novak Djokovic who have been No.1, though they have laid claim to the throne for the last eight years. There are few surprises on the list.
Let's see who they are.