Borussia Dortmund’s 18-year-old midfielder Konstantinos Karetsas was hospitalized due to circulatory problems during his side’s Champions League match against Villarreal on Tuesday at Signal Iduna Park, according to club statements and reports.
What Happened on the Pitch at Signal Iduna Park
The incident occurred in the 27th minute of the fixture. Karetsas went down with no other players around him shortly after executing a routine pass. The teenager immediately signaled to the Dortmund bench that he required medical attention. According to pitchside accounts, medical personnel treated the midfielder on the field for several minutes before placing him on a stretcher and carrying him off the pitch.
During the second half of the match, Borussia Dortmund issued an official update regarding the player’s status. “Konstantinos Karetsas had to leave the field due to circulatory problems,” the club statement read. “Kosta is doing well under the circumstances and is on his way to the hospital for further tests.” Later on Tuesday evening, Dortmund managing director Lars Ricken addressed reporters on the situation, stating: “He felt lightheaded due to circulatory issues. There were no signs of it beforehand. He went to the hospital for further tests. It would be irresponsible to speculate at this point.” Additional reports noted that subsequent medical evaluations pointed toward dehydration as a primary factor behind the sudden spell.
Impact on Niko Kovac’s Squad and Summer Recruitment
The health scare adds to a mounting series of roster challenges for Dortmund manager Niko Kovac early in the campaign. Karetsas arrived at Signal Iduna Park during the summer transfer window from Belgian side Genk, establishing himself quickly by starting each of the team’s opening Bundesliga and Champions League fixtures.

Dortmund’s investment in young talent this summer also brought in fellow Greece international Giannis Konstantelias from PAOK. However, the club has faced bad luck with their arrivals. Konstantelias suffered a torn anterior cruciate ligament in his left knee during his Bundesliga debut last month. That absence forced Dortmund into the market to secure Arsenal playmaker Ethan Nwaneri on loan.
Upcoming Fixtures and Squad Depth
On the pitch, Dortmund managed to secure a 3-2 victory over Villarreal to open their European campaign successfully, building on a strong domestic start that has seen them claim two wins from their opening two Bundesliga matches. The team’s immediate focus turns to domestic competition, with a home fixture scheduled against Paderborn on Saturday.

Club medical staff will continue to monitor Karetsas following his discharge from the hospital, though official timelines for his return to training have not yet been released.
Keep reading
- Real Madrid vs Rayo Vallecano: Mourinho’s Struggling Side Seeks Redemption at the Bernabéu
- La Rochelle Forwards Coach Discusses Potential Player Departures Ahead of Transfer Window
- Why Movie Subtitles and Dubbed Dialogue Often Don't Match (daybreakwire.com)
- Como and Man United Shine in Champions League Openers as Lens Secures Dramatic Win (archyde.com)