The Reds return to action following the international break and keen-eyed observers will have noticed a few faces were absent during Friday's open training session, streamed live on MUTV.
Benjamin Sesko is set for a few weeks on the sidelines, after pulling up injured late on in the dramatic 2-2 draw at Tottenham Hotspur earlier this month.
Our no.30 withdrew from international duty with Slovenia and is working on his recovery, but Amorim says the issue is not too concerning.
"He is going to stay out for a few weeks, I don't know how long, but it is not that serious," the boss said.