Dimitar Berbatov has criticised Manchester United boss, Sir Alex Ferguson for the way he was treated during his final season at the club.
According to the BBC, the striker, 31, made only 12 Premier League appearances for United in 2011-12 and moved to Fulham last week.
"I said goodbye to the people who deserve it, I couldn't say goodbye to Ferguson," said the Bulgarian.
"I know he's the boss but he has lost, to some extent, my respect because of the way he treated me."
Berbatov moved to Old Trafford from Tottenham for £30.75m in 2008 and was the Premier League's top scorer in 2010-11, but was left out of United's squad completely for the 2011 Champions League final against Barcelona and then featured only fleetingly the following season.
"I don't think I deserved such treatment at United, not playing in the last year," he told reporters in Sofia.
"I went probably 15 times to ask the coach if they need me. And every time I was told that I'm an important player and should not leave but then again I was not in the team.
"Maybe I should have gone when he [Ferguson] left me out of the squad for the Champions League final."
The summer arrivals of Robin van Persie and Shinji Kagawa pushed Berbatov further down the pecking order at Old Trafford, with Wayne Rooney, Javier Hernandez and Danny Welbeck already preferred up front.
Berbatov believes he fell out of favour because Ferguson wanted to play with a different style.
"He tried to explain to me that the team will be using a more direct style, with more speed," he said. "But I've never been among the fastest players, I like to hold the ball, this is my style.
"I found it hard to accept his decision, I still have my dignity. I scored many goals, I won the league two times, and I was the league top scorer, so it's not bad.
"I'll have no problems playing against United as this already happened in my career. But there's no point to look back again."
And Berbatov's move to Fulham, for a reported £5m, was not without controversy, after he angered Fiorentina by turning down the chance to join them and then rejected a move to Juventus.
He explained: "I've never personally told them, 'Yes, I'll play for you'. It's not my problem that someone is disappointed. After all, I choose where to play and be happy."
Berbatov's agent Emil Danchev also revealed that Tottenham had made a last-ditch attempt to re-sign their former player.