Dortmund's Champions League Win Overshadowed by Karetsas' Injury

Dortmund’s Champions League win in Spain stopped feeling like a football match the moment Konstantinos Karetsas went down.

The 18-year-old, making his debut in the competition against Villarreal, had just played a simple pass when something was clearly wrong. He raised his arm, signalled to the referee, then sank to the turf, sitting on the grass as teammates and opponents rushed towards him and the stadium fell into a stunned hush.

Medical staff sprinted on. Players turned away, some in disbelief, some in prayer. This wasn’t cramp. Everyone knew it.

Club confirms circulatory issue

Dortmund moved quickly to address the growing anxiety. Not long after Karetsas left the pitch, the club released a statement confirming the problem was related to his circulatory system.

“Konstantinos Karetsas had to leave the field due to circulatory problems,” the club announced. “Kosta is doing well under the circumstances and is on his way to the hospital for further tests.”

It was a sliver of reassurance on a night that had suddenly become about far more than group standings and away goals.

Goalkeeper Gregor Kobel, speaking after the final whistle, gave voice to the dressing room’s concern and hope.

“I hope and I think that everything is OK and I hope that he's back and fit with us soon,” he told broadcaster Amazon Prime, his words carrying the weight of a squad shaken by what they had just witnessed.

A summer built on youth, hit by brutal luck

Karetsas arrived at Signal Iduna Park in the summer as one of the centrepieces of Dortmund’s latest rebuild. The club pushed hard to land him from Genk, paying around €30 million (£25.7m/$34.9m) for the former Belgium youth international, betting big on his ceiling and his ability to shape their future.

He wasn’t alone. Fellow Greece international Giannis Konstantelias joined in the same window from PAOK for €26m (£22.3m/$30.2m), another bold move in a recruitment drive built around elite young talent ready to light up Europe.

Both were meant to be central to Dortmund’s Champions League push. Both were supposed to grow into the club’s next great European side.

Instead, the plan has been ripped up almost as soon as it began.

Konstantelias had already suffered a devastating blow, sustaining a serious ACL injury on his Bundesliga debut that is likely to rule him out for the rest of the season. Now Karetsas’ collapse, even with the early positive signs from the club, adds another layer of worry.

For Niko Kovac, it is a nightmare scenario: two marquee signings, two major scares, and a tactical blueprint that needs constant rewriting as the fixtures pile up across league and Europe.

Guirassy delivers on milestone night

Somehow, amid all that, there was still a football match to be won.

When Karetsas left the field, the game was goalless and flat, overshadowed by concern. As the minutes ticked by, though, the contest finally burst into life and turned into a 3-2 thriller that Dortmund wrestled their way through.

On his 100th appearance for the club, Serhou Guirassy chose the perfect moment to underline his status. He struck twice late on, a ruthless brace that dragged Dortmund over the line and sent all three points back to Germany.

Those goals did more than decide a group-stage tie. Guirassy’s double also pushed him past Robert Lewandowski’s tally for the club, a landmark that would normally dominate the headlines on any other European night.

Instead, it felt like a powerful footnote.

Dortmund’s Champions League ambitions remain intact, the win in Spain keeping them firmly in the hunt. But as the squad flew home and the noise around the result faded, one question cut through everything else: how quickly, and how fully, will Konstantinos Karetsas be back?