A Greek newspaper has reported MC are looking to buy Nico Martinez out at the end of the season from Olympiacos.

link?

Are you sure, in terms of Nico Martinez? Or do you mean Melbourne City's current Argentinean loanee, Nicolas Colazo? Colazo is on-loan at Melbourne City from Boca Juniors. Nicolas Martinez is, as you correctly identified, on-loan from Olympiacos - but he's on-loan to the West Sydney Wanderers. I presume it's the WSW looking to buy out Nico Martinez's contract, not MC? Or are MC looking to steal a talent from their A-League rivals and there-fore the likely departure of Colazo to make way for him? :?

Don't see why MC or any other interested club wouldn't try and buy him. A handy player though midfield isn't exactly their problem position

Comments also say there has already been an agreement reached (can't confirm, my Greek isn't fantastic)

Apparently he wanted to stay in Australia.