The Brazil international is quietly confident that die Wolfe will improve on their disappointing 11th-placed finish in the Bundesliga last term
Diego is expecting a "much better" Wolfsburg this season - but is refusing to make any bold predictions about where the club might finish in the Bundesliga.
Die Radkappen limped home in 11th place last term but the 28-year-old playmaker feels significant progress is being made ahead of the 2013-14 campaign.
"[We will be] much better, much better, I think, but we still have some things to improve with the ball and without the ball also," Diego told reporters.
"We feel better and I hope in the future we can play better because I think we made some mistakes and that should not be normal for us. But at the moment I think we are on the right way."
However, having tasted disappointment before, Diego feels it would be foolish to start talking publicly about any specific targets Wolfsburg might have for the new season.
"I think at the moment we don't speak about targets because in the last three seasons we spoke about being champions or being in the Champions League or Europa League and in the end we fight against relegation," the Brazilian pointed out. "So, we must be honest and quiet.
"Of course we want to make a very good season and we can do that together but we should go step by step and I hope we can win the first three points and after that we think about the next one."
Diego returned to the Volkswagen Arena last summer after a year-long loan at Atletico Madrid, going on to score 10 goals in 32 Bundesliga appearances.