In an interview with The Times newspaper, Michael Carrick has admitted that he suffered from depression for two years after making a mistake which cost Manchester United in their 1-0 defeat to Barcelona in the 2009 Champions League final. The ex United midfielder who is now assistant coach at Old Trafford, lost the ball in the build up to Barcelona's goal which was scored by Samuel Eto'o and proved to be the winner. "I beat myself up over that goal," he said."I kept asking myself: 'Why did I do that? And then it [the depression] snowballed from there."It was a tough year after that. It lingered for a long time."I had won the Champions League the year before, but that was totally irrelevant."It felt like I was depressed. I was really down. I imagine that is what depression is."The 37-year-old spoke about the extent to which depression affected him, even to the point where he didn't want to go to the World Cup in 2010. "It was my dream to be at a World Cup but the truth is I didn't want to be there [in 2010]. I wanted to be at home," he continued."I kept it to myself most of the time. Even my family didn't know the full extent of it."It's not something that's really spoken about in football. I have not spoken about it before. "For the lads that I have played with that are reading this, this will be the first time that they know [about the depression]. They wouldn't know."