Cardiff Blues will be without flanker Ellis Jenkins for a number of weeks after he suffered a knee injury against Harlequins last Thursday.
The openside flanker was forced off during the second-half of the Challenge Cup clash and has now been diagnosed with a knee ligament injury.
While the news is a setback, head coach Danny Wilson does have it cushioned by the fact that fellow back-row Josh Navidi is set for a return.
"Ellis has picked up a knee injury that is going to rule him out for probably six weeks," said Wilson when speaking to Blues' official website.
"We will see how his recovery and rehabilitation go; but it's a knock that will certainly take a few weeks to heal up.
"It's not as bad as we first though, which is a positive. He is a player who had taken his opportunity and was playing well.
"It's a shame that has happened, especially with his performances over the last two or three games."
Wilson added on Navidi: "Josh is making really good progress and he is hopefully going to be available for selection this week.
"We have made sure we haven't pushed the process and turned the injury from a short-term one into a long-term one.
"Josh has recovered well and is pushing himself forward, but whether he is involved immediately is another matter and we will pick the team later in the week and make decisions."