Sven Bender is set to miss Borussia Dortmund's next two matches and is a doubt for the Champions League showdown with Real Madrid next week with a minor calf strain.
Bender, 23, was once labelled the "indestructible robot" by Dortmund supporters, who drew comparisons with Chuck Norris, but for the past year the Germany international has suffered with several injuries, and lost his spot in Dortmund's first-team as well as missing out on Euro 2012.
The hardworking midfielder has sustained a variety of injuries in recent times. Bender broke his jaw in Dortmund's Champions League defeat against Arsenal last November, bruised his ribs, dislocated his shoulder and missed matches with a hernia among other problems.
His latest knock, picked up in Dortmund's 2-1 win over Real Madrid last week means he will miss Dortmund's cup match against second-tier Aalen and Saturday's Bundesliga match against Stuttgart.
According to the club Bender could make the Real Madrid match on November 6, but will remain a doubt until the last minute.
On Tuesday evening cup holders Dortmund travel to Aalen with coach Jurgen Klopp opting against rotating "four, five or six players", and also deciding to stick with first-choice goalkeeper Roman Weidenfeller.
The BVB coach ruled out handing Mitch Langerak a start, unlike last season's campaign where the Australian goalkeeper played every other cup match - and starred in Dortmund's 5-2 final win against Bayern Munich, replacing injured Roman Weidenfeller after 30 minutes.