Galatasaray conceded two more goals in the second half, with Gundogan admitting the defeat was self-inflicted. He stated that errors at this level will always be punished and that Frankfurt were clinical in taking their chances.
"It felt like we invited Frankfurt every time we conceded, simply giving them away," a disappointed Gundogan said. "In the Champions League, every opponent has the quality to punish these errors. If you make the first, the second, the third, then you'll be punished at some point. Frankfurt did that coolly today and scored five goals accordingly. It just wasn't good enough overall."