The 23-year-old central midfielder has been linked with moves to Barcelona, Real Madrid and numerous Premier League clubs in the last 12 months but his future plans were sidelined in April when his coach Jurgen Klopp confirmed the German international would miss the World Cup with ongoing problems due to a back injury suffered in August 2013.
His displays in the Bundesliga and Champions League with Dortmund had seen Gundogan emerge as a young player who could challenge Bastian Schweinsteiger and Sami Khedira for their roles in the heart of the Germany midfield but his injury put that possibility out of reach for the player.
"On one hand, it was incredible for those guys. On the other, it was personally bad situation. You know what you could possibly have been doing, possibly been called a world champion," he told Bild.
"In such stupid ways are dreams shattered. Dreams you had as a child are broken - at least, for now."
Manchester United, Chelsea and La Liga rivals Barcelona and Real Madrid had been persistently linked with the player in January and the previous summer, with his contract at Borussia Dortmund due to expire in the summer of 2016 but now with two years left on his deal, he revealed he is leaning towards staying at Dortmund to complete his recovery and regain his form.
"I haven't thought about a break in my career. Of course, I wondered if I would ever get back to the form I was in."
"The [previous] contract was only for a year and a half. BVB wanted certainty, so as soon as I'm fit and well, we will sit down and talk about another extension and the future," he added.
Football is a fast-paced industry in which fates can change in the blink of an eye and, for Gundogan, the back injury he suffered 12 months ago may have scuppered his chances of moving abroad as well as his dreams of winning the World Cup that he described as “shattered”.