Bayern Munich boss Niko Kovac has branded Serge Gnabry's time at Arsenal a "step back".
Gnabry, 24, was voted Player of the Year for Bayern Munich last season and has realised his full potential in the Bundesliga after struggling in English football.
Kovac said: “It is hard for young players, he was young when he went to the UK, England to play for Arsenal and it is a strong league so for any young player it is difficult to prevail and to make it in such a strong league but this is what you have to go through.
“I think he has had a positive development. Everyone can see that. But sometimes for younger players it is better first to do a step back, going to Bremen and then Hoffenheim and then to us, than to do two steps ahead.
“To be stronger, return even stronger and this is I think a normal process of a young player, what he should go through but we can see he has had a great development and he has increased and has been showing great performances since then."