Scarlets back-row James Davies has been ruled out for the remainder of the season after failing to recover from a concussion related issue.
Davies has been out of action since featuring for Wales during the Autumn Nations Cup in November last year.
Scarlets head coach Glenn Delaney said they have decided to give Davies sufficient time to regain full fitness and is expecting the 30-year-old to make a strong comeback in the 2021/22 season.
“He is probably somebody we will not see until the start of the next campaign,” he told the BBC.
“We are being really cautious with him. He is training on the side and not in the team sessions yet.
“He is doing his conditioning, running and weights work. When you bear in mind the lay-off that he has had, he has to completely recondition his body so he can play safely.
“I would think he might not make this season but that is not to the detriment to the work that is going on with him.
“It might just give him an even better chance to make sure next season is an absolute cracker.”
Davies has been with Scarlets since 2013 and went on to make 23 appearances on his debut season for the club. He made his international debut for Wales during the 2018 Six Nations tournament and has featured in 11 games including three in the 2019 World Cup in Japan.
Scarlets started their Rainbow Cup campaign with a 32-52 defeat to Dragons and will face Ospreys in the second round on Saturday.