Pretty much this. Had a quick read up, could just be a small tear and not require surgery, would still swell up if that's the case. Fingers crossed it just swelled a little bit and it's precautionary, from the quotes ('Santon's knee looked a little bit unhealthy after training), it sounded like he completed the training session, and then it swelled up after. Would hazard a guess that a larger tear would stop him from continuing? Perhaps it wasn't that bad #overlyoptimistic
I'm hoping this is the case.
Well the part of the meniscus that was torn has already been removed :http://www.inter.it/aas/news/reader?N=33636&L=en
Therefore part of the shock absorbancy in his knee is no longer there, so will be vulnerable to occasionally swell up when his muscles havent been tuned up properly i.e. not having played much football
Aha! Pardews fault for not playing him against QPR then. Pardew out!