Andre Agassi has withdrawn from the ATP Tennis Masters Series Event in Madrid played in October. ATP officials made a mistake, not taking Agassi's name off the Entry Computer as he was still ranked high enough to gain direct acceptance.
The ATP doesn't remove anyone from the ATP rankings when they retire. Unlike the WTA which allows players to officially retire by asking to be removed from the rankings after they announce their retirements (example: Steffi Graf), there is no official retirement process in the ATP. ATP players simply fall off the rankings 52 weeks after their last countable event. SteveG's site has a list of the players who drop off every week and you can see there that anyone who announced their retirements (example: Todd Martin) stayed in the ATP rankings until 52 weeks after their last events.
When the entry list was confirmed back in August, Andre was ranked at 39th and nobody withdrew him till Darren Cahill noticed Andre's name on the entry lsit whilst surfing the net last week. Agassi escaped a heavy fine and announced his withdrawal from the event on Wednesday. However from now on Agassi won't have a problem as his ranking is registered below 100. Tha laughable thing is that he is OFFICIALLY RETIRED AND HE'S HAVING TO WITHDRAW!!!!!!
He wouldn't have faced a "heavy" fine: there's no penalty for withdrawing from the alternate list and if he had gotten in and then withdrew, his fine would be minimal as he's ranked outside the top #100 (& the ATP would probably have waived it anyway).