Goetze said on Dortmund's homepage that he was undergoing treatment and will do all in his power to be back in training and helping the team as soon as possible.
Mario Goetze out indefinitely with 'metabolic disturbances' →
"To do it would be my biggest dream come true," Goetze said. "Yet that was a long time ago. I'm focusing on the future and on this Champions League season. It's not going to be easy next time against Sporting."
Ronaldo 2 goals shy of 100 in European competitions →