Bayern head coach Julian Nagelsmann hailed Robert Lewandowski ahead of his former forward's return to the Allianz Arena with new team Barcelona.

The Poland star spent eight successful years with the Bundesliga outfit, winning the league title every year among other honours and breaking several goal-scoring records, before moving to Spain for €45 million during the summer.

The 34-year-old continued his rich goal-scoring form with five goals in four matches for Blaugrana, including a hat-trick in a 5-1 win against Viktoria Plzen in the UEFA Champions League, in which Barcelona and Bayern are in the same group.

With both teams facing each other on September 13, Nagelsmann insisted there was no bad blood with Lewandowski's departure being handled.

"I am looking forward to [seeing him again], not necessarily as an opponent because he's a big goal threat, but as a human," he said.

"I'm excited that he returns. I hope that the fans will honour him for what he did for Bayern, disregarding how the farewell was or if it was understandable for everyone or not.

"It will be an exciting game. [Barcelona] are very strong again and have started well in [La Liga]," he said.