One question posed for Duffer was if he made the right choice joining Chelsea... his answer was emphatic: "I was thinking about this just the other day, and I came to the conclusion that I definitely made the right choice, 100%.
"I could have stayed at Blackburn in the comfort zone, knowing that I just had to turn up to be in the team on the Saturday, or I could come down here and play a totally different ball game, where you experience real pressure at all times.
"If you want to improve, you have to push yourself - it's as simple as that."
When asked about his injured shoulder, Duff replied: "I'm not yet ready for contact, because if I fell over I could easily damage my shoulder again, but hopefully I will get a game out in the United States.
"Otherwise, I'll be raring to go for the opening day of the season against Manchester United."