Konstantinos Karetsas collapsed during Borussia Dortmund's Champions League opener against Villarreal without any physical contact, sparking immediate concern among supporters and medical staff at Signal Iduna Park. The 18-year-old Greek attacking midfielder went down suddenly in the 23rd minute after executing a routine dribble and passing sequence moments before raising his arm to signal for treatment. Initial medical assessments now point to dehydration as a potential cause for the incident, according to reports from Belgian outlet Het Laatste Nieuws.
The collapse unfolded rapidly as paramedics rushed onto the pitch to attend to Karetsas, who was carried off while visibly emotional as the crowd applauded in support. Dortmund's sporting managing director Lars Ricken initially described the episode as sudden circulatory problems, a characterization that aligns with preliminary hospital findings. Sporting director Ole Book told media immediately after the match that Karetsas was unable to speak coherently when he visited him, emphasizing the unpredictable nature of the medical emergency. By Wednesday, BVB had offered limited official comment beyond confirming the player was "doing well under the circumstances," with no comprehensive diagnostic results released publicly.
Mounting Injury Crisis at Dortmund
The incident arrives amid a deepening injury crisis at the Bundesliga club. Giannis Konstantelias, another attacking recruit signed by Dortmund, already suffered a torn cruciate ligament during his debut against Hamburger SV and faces an extended absence from competition. To address this shortage, BVB secured Ethan Nwaneri on loan from Arsenal before the transfer window closed, with the young forward replacing Karetsas on Tuesday.
Defensive vulnerabilities compound the club's problems. Manager Niko Kovac was forced to substitute three players during the Villarreal clash—Nico Schlotterbeck, Emre Can, and Filippo Mane—due to injury concerns. Ramy Bensebaini remains sidelined with a bruised ribcage and carried a suspension from his red card dismissal in February's 1-4 defeat to Atalanta Bergamo, limiting defensive rotation options. Despite these mounting setbacks, Dortmund secured a 3-2 victory in their European campaign opener.
Losing Karetsas for any significant period would represent another severe blow to Dortmund's attacking depth as they balance Champions League ambitions with domestic title challenges. The club faces critical weeks ahead in managing player fitness and recovery while maintaining competitive performance across multiple competitions.
