Rhys Webb has allayed fears over his fitness after a blow to the head delayed his attempt to earn a Wales recall.
Scrum-half Webb missed the Rugby World Cup due to a foot injury, but returned for the Ospreys in Sunday's Pro12 victory over Munster.
A clash of heads towards the end of that fixture has ruled Webb out of his region's next match against Edinburgh on Friday.
However, Webb played down the severity of the setback, tweeting: "Thanks for all your messages. I'm fine but due to a short turnaround won't have enough time this week. Don't worry I'm back."
Ospreys head coach Steve Tandy had earlier been quoted by BBC Sport as saying: "It's disappointing for us but more importantly it's about Rhys.
"I don't think it'll keep him out for too long, but with these head-injury assessments you've got to make sure that players are at the forefront of these decisions."
In Webb's absence from international duty, Gareth Davies has shone at scrum-half for Wales.
Davies scored five tries at the World Cup and crossed again in Saturday's 27-23 victory over Scotland at the Principality Stadium.