Operation for what? I'm calling bullshit, he was out because of a stamp on his foot which caused bruising.
If it was some work he'd needed to have done anyways that's another thing, but then in that case they wouldn't push him throughout and wait until just now we're near the final stretch to do it. Arteta would make him push until the end of the season.
Once again, no way this is true unless he got injured in training.
