Ole Gunnar Solskjaer says Manchester United will be fully motivated when they meet League Two Colchester United in the Carabao Cup on Wednesday, reports BBC Sport.
The United boss is expected to make changes for the quarter-final tie.
"We showed that by the team we put out against Chelsea [in the fourth round] that we take this seriously," Solskjaer said.
"Now we've got a chance to get into the semi-finals and, for us, this game is a big one."