Klopas insists there's no intimidation after United's 7-0 thrashing of the Seattle Sounders.
"It's a game our players are looking forward to, and so are our fans," Klopas said. "The boys are ready. I assured Sir Alex that they're going to play hard, and I promised him a nice bottle of Greek wine after the game."
Klopas said newly signed midfielder Sebastian Grazzini likely will see some minutes, but that he's not ready to play a full game.
"He's coming along," Klopas told the Chicago Tribune. "But he's nowhere near (being) able to go 90 minutes. He finished his season (in Argentina) maybe four-five weeks ago, and he has been on a break. Now our main focus looking ahead is making sure his fitness level is (good enough) to play the game."