Connacht are sweating over a shoulder injury sustained by flanker Jake Heenan in the closing stages of Saturday's Pro12 victory over Dragons.
Heenan, who was out for the last six months after surgery on an injury to the same shoulder, made his return to competitive action in Saturday's game, but took a blow late on.
Connacht coach Pat Lam confirmed that the 22-year-old New Zealander would have tests later this week to discover the scale of the injury.
"Jake aggravated his shoulder in the last couple of minutes of the Dragons game. It was a bit sore, he didn't train today and he is going to have further tests in the week.
"We are hopeful for this week. He had surgery and was out six months. It was straight after the Saracens game. It's the same shoulder," said Lam.
Fresh from their opening-day win, Connacht have been boosted by the confirmation that Irish international Robbie Henshaw has been cleared by the IRFU to take part in Friday's game against Edinburgh at Murrayfield along with scrum-half Kieran Marmion who made an appearance off the bench in the 16-11 win over the Dragons.
"Robbie is available, he's all good. He's really keen. He was in the stand (against Dragons) and was really enjoying it like everyone else," added Lam, ahead of the trip to Scotland to face an in-form Edinburgh side.