From your greeting at the airport to your sleepless night in the team hotel, you finally arrive inside a cauldron of noise like Besiktas' Vodafone Park and encounter scenes that last from the first minute until the 90th.
It was reported the 21-year-old was given a pair of earplugs by the bench before he asked to be substituted because of noisy Besiktas fans.
"In the first half, my players were a little overwhelmed" by the noise of the stadium of Besiktas, has also admitted Hasenhüttl, " it is impossible to prepare your team in an atmosphere like that.
But Hasenhüttl also appeared to criticise Werner's request to be withdrawn so early, hinting that the was disappointed in the reaction of the player who has scored six goals in eight global appearances so far.
"He asked to come off so I took him off", he said.
But while Hasenhuttl added further information by confirming Werner suffered circulation and breathing issues, he revealed the club are still awaiting concrete information. "There was a deafening noise [and] at the start of the game we were a bit affected".
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Besiktas' victory, courtesy of goals from Ryan Babel and Talisca, mean they are on track for a debut appearance in the knockout stages.
"It was a lesson for all of us".
'I saw who I can count on in times like these.
Having kicked off their campaign with a 3-1 win at Porto, the Istanbul giants now lead Group G with six points, while their closest pursuer Porto has three points.
The unnerving atmosphere was only enhanced in the second half when the floodlights went out for over ten minutes, leaving the players in darkness.