Melbourne City face a battle to keep Socceroos star Aaron Mooy, with the marquee being chased by several European clubs.

The club will work hard to ensure Mooy remains at the club until at least season's end, however, a bevy of offers from overseas are likely to flood in during the January transfer period.

"Melbourne City is not obligated to sell Aaron nor does the club have any intention of selling," a club spokesman said.

However, sources suggest they may not be able to resist the offer from one of Italy's biggest clubs who lead the chase for Mooy's signature while Melbourne City's owners, Manchester City, are also eager to keep him part of their football family. Clubs in the UK, Spain, the Netherlands and Germany are also pursuing the midfielder and have already signalled their interest with Melbourne City.

Mooy's days in the A-League could  already be numbered after the playmaker's impressive start to the season and starring roles in the Socceroos' first round of World Cup qualifiers.