Is it unusual how little changed in the top 10 this year compared to last year? Nadal fell down to four because of injury, moving Federer and Murray a spot up. Tsonga did a bit worse, (from 6 to 8) and Delpo replaced Fish. Only 1 other player in it altogether. Is this unusual or has this happened a lot over the years? Particularly the fact that the same players are ranked 9 and 10 surprises me.