Stock futures fell on Monday as investor returned to the market after a holiday-shortened trading week, focused on the meeting of euro zone finance ministers on Greece and negotiations in the U.S. over the "fiscal cliff".

* Knight Capital Group Inc is in talks about possibly selling its market-making operation, its largest and most profitable business, but it is not known if a deal will happen, a source said on Saturday.

* Apple Inc has asked a federal court to add six more products to its patent infringement lawsuit against Samsung Electronics Co <005930.KS>, including the Samsung Galaxy Note II, in the latest in move in an ongoing legal war between the two companies.

* Black Friday's online sales topped $1 billion for the first time ever as more consumers used the internet do their early holiday shopping, comScore Inc said on Sunday.

(Reporting By Angela Moon Editing by W Simon)