Juande Ramos has criticised Tottenham's transfer policy under sporting director Damien Comolli and insists he was not given enough experience in his squad.
Ramos lost his job as head coach at the weekend along with Comolli, whose signings since the previous summer struggled to make an impact.
Tottenham were at the bottom of the Barclays Premier League after selling Dimitar Berbatov and Robbie Keane for more £50million and then failing to find adequate replacements.
''In the summer we experienced a difficult pre-season due to the changes in the squad, which prevented us from working with the tranquility that the summer preparation needs,'' Ramos said in an open letter on his personal website.
''Furthermore the young age of some of the signings, despite their quality, means they needed some time to adapt and mature, which because of the urgency of the competitions they have not been given.
''Also the departures of Robbie Keane and Berbatov, important players in the team for their technical and human qualities and their scoring abilities, was too hard a blow for the squad.
''All this triggered a situation which I hope will be turned around as soon as possible because the club and fans deserved it.''
Former Spurs boss Martin Jol had wanted a left-sided midfielder in the summer before his departure but Comolli never found the right man.
Comolli's failure has been highlighted by chairman Daniel Levy scrapping the continental structure Ramos was working under.
Meanwhile, Ramos and Tottenham need to come to an agreement over his pay-off, and the Spaniard has also been linked with moving to Shakhtar Donetsk or Atletico Madrid.
Ramos, whose team won the Carling Cup earlier this year, added: ''After almost 20 years in the game I know the unwritten rules of football and that's why I accept the decision taken by the leaders of Tottenham.
''We arrived with the highest hopes to a team in the relegation zone, in a situation similar to that which is found at these moments, and we had a good start which saw us get to the middle of the table.
''Furthermore, we were able to qualify for Europe when it seemed almost impossible. We achieved it with a great effort on the part of all the team despite the enormous difficulties that we had.
''We also achieved the difficult challenge of lifting a title, which after nine years without tasting success was an enormous joy for all the club and the fans.
''For this we can catalogue last season as tremendously successful.''