The Poland captain – scorer of 14 goals in all competitions already this season – limped off after netting in the 2-0 win over RB Leipzig last Saturday and failed to make the UEFA Champions League trip to Celtic on Tuesday, which Bayern won 2-1 to book their passage to the knock-out stages for the tenth consecutive season.
Watch: All 87 of Lewandowski's Bundesliga goals for Bayern!
“It's not my ideal choice to replace someone in attack with a midfielder,” Heynckes said at his post-match press conference. “I thought the team did really well with this. Lewandowski has trained well with no complaints. It looks like he’ll start against Dortmund.”
Lewandowski has lined up against his former employers 12 times since swapping the Signal Iduna Park for the Allianz Arena in January 2014, scoring eight times.