Stoke City boss Tony Pulis says their fans can be the difference this week against Besiktas.
Pulis is hoping that his side will be roared on by a big crowd when they take on Turkish Cup winners Besiktas at the Britannia Stadium on Thursday evening.
"The challenge is for our supporters to generate as much, if not more noise as their fans are sure to make out there," he told Stoke's website.
"The atmosphere here at the Britannia Stadium was incredible on Saturday and we need the place to be rocking again come Thursday night."
He added: "It will be a fantastic night, our first major European tie for almost 40 years and I am excited about the chances of us doing well in Europe. A chance like this doesn't come along too often, so we need to make the most of it."