Gundogan will have no trouble with Xavi's game tactics. he will be a tremendous support for Lewandowski. this season could be the most productive season for Barcelona I think. I don't understand why Pep could let Gundogan go to Barcelona. he is one of City's important players in getting a trophy this season. I'm sure it will be Xavi's luck this season.
As long as Gundogan understands Barcelona's style of play and can understand Xavi's directions, Gundogan will remain safe in Barcelona despite his old age. Barcelona must make good use of Gundogan so that in La Liga this season they have weapons and are ready to compete.