O’Brien spoke exclusively to West Ham TV, “It’s four weeks now since I had the operation. I’m heading back to the surgeon soon and hopefully he will give me the all-clear to step-up my training a little bit and do a little bit more.
“I’ve been doing really basic stuff since the operation like getting it out of the sling and trying to get the movement back. I’ve mainly just been doing really low-level strengthening exercises. Hopefully I’ll get the all-clear and then I can step it up.
“I don’t really know when I’ll be back yet to be honest with you. I have to wait and see what the surgeon says and then we’ll go from there.”