The Turkey midfielder, visibly moved while recalling the incident, admitted he would never forget the look of terror on his teammates’ faces.
Three explosions – believed to have been detonated by a mobile phone – targeted the Dortmund team bus as it made its way to the Westfalenstadion on Tuesday.
Marc Bartra was injured in the attack and needed surgery on a broken wrist, as the Champions League quarter-final was postponed until Wednesday.
Speaking after the game, which Dortmund lost 3-2 to Monaco, Sahin opened up about the horror felt on board the bus moments after the attack.
“I get goosebumps, when I was on the bus last night, I can’t forget the faces, I will never forget the faces in my life, for sure,” said the Turkey international.
“When I saw Marc [Bartra] there, and I sit next to [Marcel] Schmelzer, and I will never forget Schmelzer’s face, it was unbelievable.
“It’s hard to talk about, it’s hard to find the right words.
“We saw it a lot of times on TV and it was far, far away from us, even when it was in Istanbul in my country on New Year’s Eve.
“It was close but also very far from us, but last night, we felt what it is like to be in a situation like this, and I don’t wish anyone to feel like this.”
Some Dortmund fans were angry that the game went ahead the day after the attack and held a banner to show their frustration.
The sign read: “6.45pm kick-off, are you kidding? F*** Uefa.”
Sahin himself admitted his head was on other things and not the massive fixture, suggesting the game was indeed played too soon after the incident.
“I don’t know if people can understand this, but until I was on the pitch, in the second half, I didn’t think about football to be honest,” said Sahin.
“Last night I didn’t realise what had happened when I was at home with my wife and son waiting in front of the door, and I felt how lucky we were.
“I know football is very important, we love football, we suffer with football and I know we earn a lot of money, we have a privileged life.
“But we are human beings, and there is so much more than football in this world and last night we felt it.”