The Bulgarian star became United’s record signing when he joined the club in a £30million deal from Tottenham in 2008.
“Every person is different in coping with the pressure of the price tag,” said Berbatov. “Every person thinks differently. For me, sometimes it is difficult because people expect so much of me.
“The fans have probably seen glimpses of my best goals, passes and games. I know you need to show that all the time and that’s my main goal – in every game to show my best game.
“But that’s the way it should be because the people here have paid so much money for you.
“I try to give my best for the team to win things. I think I did that in my first season. We won the championship and I think everybody was happy about that.
“I’m happy. I love it here. The club are bigger than you think.
“United are one of the biggest clubs in the world and you are playing with some of the best players in the world.”
