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.
Somehow some people doubt Gundogan at Barcelona, while he is a player with high experience with the team who is also a former Barcelona coach. Xavi adopted a lot of Pep Guardiola's playing style in his playing system, so Ilkay Gundogan shouldn't find it difficult to adapt to Barcelona's game.
Even so, the adaptation process also had to be faced by Ilkay Gundogan because the Premier League was never the same as La Liga. Xavi has good plans for Gundogan next season, so I hope he can bring a lot to the Barcelona squad and will bring a winning mentality to the other players. I have no doubts about Gundogan's qualities, but he will also have to compete with other players for a place in Xavi's main squad.