It was one of the most impressive runs in tennis history, but all records are meant to be broken.
In losing to Sweden's Robin Soderling Tuesday in the French Open quarterfinal, Roger Federer's run of 23 consecutive appearances in a Grand Slam semifinal or better came to an end.
In losing to Soderling for the first time in 13 head-to-head matches, Federer could lose the No. 1 world ranking he'd worked so hard to get back. If Rafael Nadal wins the French Open, he will retake the No. 1 spot.
So the ping pong game of "Who's No. 1?" continues.