Newcastle United boss Eddie Howe admits Sven Botman's knee injury is a big blow.
The Dutchman's season is now over due to the setback.
Howe said, "It's a big blow. It's a complex story with Sven. Initially he had a partial tear [earlier this season]. We sought specialist opinion and there was conflicting reports on what he should do next.
"Ultimately, our medical team advised him to get surgery, but he wanted to carry on. He has then aggravated that issue.
"He now has a long road ahead of him, but the operation went well so we hope he comes back in a better place. Now we'll support him and help him back."
On Lewis Miley's injury suffered with England U20, Howe said: "Lewis has come back to us with a back problem, we are seeking specialist opinion on him, we don't know exactly what it is right now."
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