The 19-year-old, who has made four appearances for the Ospreys this season, is now forced to turn his attention away from the RBS 6 Nations and focus on pushing for a place in the Wales squad that will go to Argentina in June for the IRB Junior World Championships.

There, Wales will kick things off against Samoa before facing Fiji and then rounding their pool off against New Zealand.

"James sustained a dislocated left patella, as well as rupturing associated soft tissue. Fortunately, he does not require surgery," said Ospreys physio Daloni Lucas.

"He initially faces a period of non-weight bearing on the injured leg to allow the ruptured tissue to heal, after which he faces a period of rehabilitation to regain leg strength.

“In total, he is looking at a 10-12 week lay-off, which should hopefully see him returning to fitness in time to make the Junior World Championships should he be selected."