Physio Chris Towers has confirmed that two Ospreys will undergo surgery this week.
Tom Isaacs suffered a knee injury whilst with the Wales Sevens squad last weekend preparing for final two IRB Sevens World Series tournaments of the season, which take place at Twickenham and Murrayfield over the next two weeks, while Barry Davies faces a second op on the groin problem which has limited him to just 20 minutes of rugby since last November.
For Isaacs in particular, the news comes as a blow having only returned to action with Swansea last month after a six month lay-off with a shoulder injury.
Towers commented:
"Tom damaged knee ligaments and pulled a hamstring tendon off the bone playing with Wales Sevens. It needs to be repaired surgically and at this stage Tom is looking at a period of four to five months out of the game.
"In Barry's case, he hasn't progressed as well as we would have hoped for following his surgery in March. Having sought specialist advice we have had to go down the route of further surgery to repair a damaged tendon in the groin."