The Germany international midfielder underwent surgery at the start of the week in a bid to resolve a long-standing back problem. A "minimally invasive" operation was carried out at a Munich clinic, with the club announcing that the "successful surgery, free of complications" was "a significant step towards a complete recovery".
Gündogan missed almost the entirety of the 2013/14 season for the Westphalians after damaging nerves in his back while on international duty for Germany against Paraguay on 14 August 2013. In spite of his optimism at making a return to action last term, the 23-year-old never managed to recover full fitness before the end of the campaign consequently missed out on a place at the 2014 FIFA World Cup.
Making a full and complete recovery became his primary objective, and according to the doctors who carried out this week's operation, he now only has to remain patient for three more months. "There should then be nothing preventing Gündogan from returning to action," said BVB in a statement.
Formerly of 1. FC Nürnberg, Gündogan has made a total of 104 Bundesliga appearances, the last of which came on the opening day of last season. He has scored 12 goals in Germany's top flight, as well as two in eight games at international level.