What is Diego Costa doing in Italy? It's not what you think
But, no (sigh), this doesn't have calciomercato implications. He broke his nose in training yesterday (also a bad things, by the way), and is in Milan for a checkup, though Chelsea manager Guus Hiddink has since said that the Spanish international will be available for selection for Saturday's Premier League clash with Newcastle.
Chelsea's website confirms that the 30-year-old will wear a protective mask for the time being.