Manchester United ace Dimitar Berbatov admits he suffered sleepless nights last season over his poor form.
Berba is rediscovering his best form this term, but it was a different story during his first campaign at Old Trafford.
"In my first year I was disappointed in myself. I need to say that," said the Bulgarian.
"It was a big pressure for me and maybe I failed myself. I think I wanted to prove myself to these supporters.
"You must remember, they are used to Best, Charlton, Cantona. I am just Dimitar.
"I got a number of assists, but I must score more goals."
Berbatov admits things got so bad for him last season as the critics began to round on him that he would lie awake at nights.
He in The Sun: "I don't know what I am doing wrong sometimes. Maybe it's luck, maybe it's me... who knows?
"At nights I have stayed awake thinking, 'You could have done this instead'."
The former Bayer Leverkusen ace also concedes he struggled to control his nerves.
He said: "My nerves were too much and that is my responsibility."
