Over 1,200 Fulham fans have made the trip to Switzerland for the Europa League showdown.
Kelly told fulhamfc.com: "It will be great to see so many of our fans here too. We know it's not easy making the commitment, coming all this way so close to Christmas, paying for the flight and accommodation and everything, so it's up to us to make their trip worthwhile, so they can go back thinking they got their money's worth. So hopefully we can do that for them, and for ourselves and everybody watching back home.
"They're also passionate about their football over here and you can tell it's going to be a big game. There's a lot at stake - the chance to go through to the knockout stages of the Europa League so they'll have a lot of fans backing them, and hopefully our fans will be in good voice too."