Roger Federer's loss to Ivo Karlovic Thursday paved the way for Rafael Nadal to move into the No. 1 spot and end the king's 235-week reign at the top.

If Nadal wins Cincinnati on Sunday he will be the No. 1 come Monday. Either way, when the points from the first half of the season are wiped away in two weeks, Nadal will move into the number one spot.

This is an historic moment; something that can connect people through the ages around a time-stopping moment. Like other momentous moments in history, where you were and what you were doing when you first heard the news will be a constant refernence point throughout your life.

So where were you when you heard the king was dethroned?