In a major attacking boost, Arteta will be able to welcome Emile Smith Rowe and Bukayo Saka back to the squad.
Red Devils are certainly regarded as the favourites to go all the way in this season’s Europa League.
Rashford was replaced in the 65th minute and Fernandes added another away goal at the death heading into a second leg.
Tierney is reportedly facing several weeks on the sidelines with the injury he sustained against Liverpool in the same area.
The Spanish surprise package dumped Molde out of the tournament to advance to the last eight.
The Arsenal forward, who was also flagged offside on four occasions, knows his subpar performance could prove costly.