Chelsea midfielder Frank Lampard has admitted that his disappointing World Cup performances for England in the summer knocked his confidence.
The former West Ham United star was criticised for his poor displays for Sven-Goran Eriksson's side in Germany and his tournament ended on a low when he missed a penalty in the quarter-final shoot-out defeat to Portugal.
He told BBC Radio Five Live: "After the World Cup I rued the fact that I hadn't scored any goals.
"You have to shut your ears off and not take to heart what is being said because we all doubt ourselves in certain moments.
"I had a few weeks off and now I just want to work hard. The only way you can put things right is on the pitch.
"The World Cup didn't go right for me and in the summer people were saying this and that.
"You have to be strong and, in a year's time, I'll look back and say 'I proved you wrong again'.
"What people don't see is that for all the stick I might get externally, I personally give the most stick to myself. I know when I have not played well enough."