Henriksen has been out of the side since picking up a shoulder injury against Manchester United in January but boss Marco Silva has confirmed he could have a key role to play against Everton.
However the news is not so good for Evandro, who Silva previously thought would be available, as he is still struggling with a calf injury and will miss this weekend's fixture.
"There is nothing new," said Silva. "Only Markus Henriksen has started back with us this week, but Evandro is not available.
"Henriksen has worked with us all week, so we'll see."