RB Leipzig manager Ralph Hasenhuttl admits that his players were intimidated by the Istanbul atmosphere in their Champions League defeat to Besiktas.
Ryan Babel and Anderson Talisca's goals secured a 2-0 win for the Super Lig champions at Vodafone Stadyumu, as the German side tasted defeat in their first European match away from home.
"It is impossible to prepare your team for an atmosphere like this. There was a deafening noise [and] at the start of the game we were a bit affected," Hasenhuttl said after the match.
"We were not good in the first 20 minutes at all. But it was a lesson for all of us. I saw who I can count on in times like these. This is a lesson for us to learn and we keep learning.
"In the second half, my players stepped up and had chances but it was not enough. I congratulate Besiktas and they got a deserved win."
The result leaves the Turkish side top of Group G following their win over FC Porto, while Leipzig are bottom of the group having drawn their opening match against Monaco.