The 41-year-old Klose, who holds the record of 16 goals scored at World Cup finals, has joined Bayern’s staff and will be next to head coach Hansi Flick on the bench on Sunday.
The league’s top-scorer has used the time since the Bundesliga halted in mid-March, to prevent the spread of the coronavirus, to improve his fitness.
“I feel better than ever before because I was able to work hard on my physical fitness for the last two months,” said Lewandowski, who underwent groin surgery in December. #NaijaBetBundesliga is back on NaijaBet.com with boosted odds
The Bundesliga will become the first top European league to return this weekend during the pandemic with games behind closed doors.
Bayern head to Berlin with a four-point lead at the top of the table.