Who could feature for United at Camp Nou?
Solskjaer confirmed that former Barcelona player Alexis Sanchez has returned to the squad after recovering from his knee injury and has made the trip to Spain.
The boss has been provided with another injury boost with Nemanja Matic having recovered in time to make the journey as well – although Scott McTominay, who was rested against West Ham United, is expected to start ahead of him.
Luke Shaw will serve his one-match ban on Tuesday but Ashley Young returns to the squad after serving his domestic ban against the Hammers at the weekend.
Ander Herrera and Eric Bailly remain sidelined with unspecified injuries, while youngster Mason Greenwood, who came on as a substitute in the 3-1 win in Paris, did not travel with the squad this time around.