Tottenham chairman Daniel Levy has urged the Premier League to review the transfer system.
It follows the departures of strikers Dimitar Berbatov and Robbie Keane to Manchester United and Liverpool.
United were linked to Berbatov for some time and he left on Monday, despite a higher bid from Manchester City.
Levy is unhappy at the manner of the exit and told Spurs' website it was "further evidence of the need for the Premier League to review the system".
Tottenham also lost Keane to Liverpool in July, with the 28-year-old Republic of Ireland striker joining the club he supported as a boy.
Levy added: "This summer we found ourselves having to deal with the unexpected challenge of both our leading goalscorers making it clear they wished to leave the club.
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"I have already stated my opinion on the manner in which our players were approached and the nature of the negotiations surrounding Robbie Keane and Dimitar Berbatov.
"I have also previously said that we had no need to sell players on long contracts - this no longer remains practical.
"The decisions we took to allow the transfers of Berbatov and Keane were made after close discussions with the coaching staff."
Berbatov joined United on transfer deadline day in a deal worth £30.75m.
United striker Fraizer Campbell, 20, moved in the other direction on a season-long loan deal and Spurs decided not to pursue their complaint to the Premier League accusing United of chasing Berbatov.
The 27-year-old had been left out of the Tottenham team for recent games because manager Juande Ramos felt the Bulgarian was too distracted by United's interest in him.
Levy added: "Juande was clear, and I believe correct, in not wishing to embrace any player within the dressing room that had no desire to play for the badge of this club and for his team-mates.
"Under these circumstances we had no option but to sell these players."
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