It looks like there's a chance for the oldest top 10 player, Davydenko, to drop out of top 10 in 2 months or so. He has something like 1800+ points to defend in next 2 months. And very young top 10 or ex-top 10 players have virtually no points( or low points) to defend. Del Potro - poised to become #5 in a few months. Simon, Verdasco, Monfils and Tsonga - relatively low points to defend. If Davydenko drops out of top 10, Federer, only 2 month younger than Davydenko, becomes the oldest and only player older than 26. Very very young top 10.