Diamanti had a season in England with West Ham United two years ago.
"I could only imagine playing this game on the Playstation," joked Diamanti.
"I never gave up when I was playing in the Interregionale amateur division and I won't give up now. At the end of the day, if you keep the faith and have quality, you will emerge. I managed it, but I know that I can do much better.
"Now that we're here, we will do everything we can to get through the quarter-finals. English football as a business with the stadiums, everything around it and the behaviour of the fans is about 30 years ahead of us.
"However, on the pitch Italy are stronger than England and our football is of a higher quality. We respect England, but we don't fear them.
"Andrea Pirlo is a champion and the best player in the world. Mario Balotelli is one of the 23 and gives his contribution, just as we all do. Is he motivated to be playing England? We're in the quarter-final, of course he's motivated."