Dortmund's Champions League Win Overshadowed by Karetsas Incident

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

One second, the 18-year-old was knocking a simple pass into midfield. The next, he was signalling urgently to the referee, his body language turning the stadium cold. He lowered himself to the turf, sat down, and stayed there as teammates, opponents and medical staff rushed towards him. The noise inside the ground dropped to a worried murmur.

Dortmund moved quickly to calm the panic. Not long after the final whistle, the club released a statement confirming the teenager had suffered circulatory problems.

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

No dressing room shrugs off a moment like that. Gregor Kobel spoke for the squad when he faced the cameras.

“I hope and I think that everything is OK and I hope that he's back and fit with us soon,” the goalkeeper told Amazon Prime, his words carrying the mix of concern and determination that hung over the night.

A summer built on youth, rocked by bad luck

Karetsas arrived at Signal Iduna Park this summer as one of the centrepieces of Dortmund’s latest rebuild. Signed from Genk for around €30 million (£25.7m/$34.9m), the former Belgium youth international was brought in alongside fellow Greece international Giannis Konstantelias, who joined from PAOK for €26m (£22.3m/$30.2m).

The message was clear: Dortmund were doubling down on elite young talent to drive their next European push. Both players were expected to become key figures in this Champions League campaign.

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

Konstantelias had already suffered a brutal setback, likely losing his entire season to a serious ACL injury on his Bundesliga debut. Now Karetsas, on his first Champions League appearance, was being driven away to hospital as his teammates tried to regroup on foreign soil.

For Niko Kovac, it is a nightmare scenario. Two marquee signings, two major blows. Tactical options narrowed just as the schedule begins to pile up at home and in Europe.

Guirassy turns the night on its head

When Karetsas left the pitch, the game against Villarreal was still goalless, tense and caged. The incident seemed to drain the air from the contest for a spell, players on both sides visibly shaken.

Then the match finally broke open.

Chances began to flow, and what had started as a tight tactical battle turned into a wild 3-2 scrap. In the chaos, on his 100th appearance for the club, Serhou Guirassy stepped up.

He struck twice late on, a ruthless brace that dragged Dortmund over the line and sent them back to Germany with three precious points. In doing so, he moved past Robert Lewandowski’s goal tally for the club, a landmark that would normally dominate the headlines.

Not this time.

The win keeps Dortmund’s Champions League ambitions firmly alive. The story of the night, though, was a teenager helped from the pitch, a statement about circulatory problems, and a squad waiting for updates on a teammate whose future was supposed to be just beginning.

For Dortmund, the question now is simple and far more important than group standings: how quickly can Konstantinos Karetsas return, and what will this turbulent start mean for a season built on the promise of youth?