Ulster are hoping Iain Henderson will be fit to make his comeback from injury in Friday night’s important Pro12 match away to Glasgow.
The 24-year-old back row has been out of action since early December because of a torn hamstring.
“Iain is getting closer and could play this week,” Ulster’s director of rugby Les Kiss said.
“We will see how things look on Wednesday when we get feedback from the training sessions.”
Ulster, trying to make sure of a place in next season’s European Champions Cup and reach the Pro12 play-offs, could also have some of their Irish internationals back after the Six Nations.
Backs Andrew Trimble and Jared Payne and hooker Rory Best could feature at some stage in the match at Scotstoun, probably as replacements.
Full-back Louis Ludik is expected to return to the team after recovering from a groin injury.
Fourth-placed Ulster beat Glasgow 13-10 in Belfast on 12 February and are four points ahead of the Scottish club.
“I don’t think any team that loses this week will be out of the race, but you don’t want to put two losses together, that is for sure,” Kiss added.
“Glasgow is our focus and we know it will be tough.
“We are aware of what is at stake and believe we can do the job.”