It's a romantic idea'published at 19:55 British Summer Time 19 September 2019
Man Utd v Astana (20:00 BST)
One of the Astana players who will be "living the dream" is 29-year-old midfielder Runar Mar Sigurjonsson, who is a lifelong Man Utd fan.
He thinks Astana "have a great chance" of causing an upset at Old Trafford, where he used to fly to regularly from his native Iceland to attend games.
"Of course it's a romantic idea," he said. "But you never know what can happen in football."
"It's probably a good time to play them right now. They have a lot of injuries and perhaps haven't found their best team yet."
He was part of the Iceland squad who lost 4-0 to Paul Pogba's French team in their Euro 2020 qualifier in March.