The Germany international had been sidelined since January 29 after club medics discovered he was suffering with a metabolic disorder.
Dortmund 25/1 to win Champions League
The 25-year-old battled back to fitness and featured in Dortmund’s pre-season fixtures, but missed the DFL-Supercup loss to Bayern Munich with a back injury.
Head coach Peter Bosz included him in the line-up for the trip to the Volkswagen Arena on Saturday for his side’s opening Bundesliga match of the new season.
