Wigan Athletic boss Roberto Martinez is confident he won't lose Franco di Santo in January.

Di Santo, called up by Argentina last month, is out of contract at the end of the season.

"It's not going to be a financial decision," said Martinez, who adopted a similar policy with Mohamed Diame and Hugo Rodallega a year ago.

"I can guarantee that we're not going to try and cash in early. We showed last season that if we feel a player can give us something we'll keep him, even if he can walk on a free.

"To replace a player who can score 10 or 15 goals in the Premier League you've got to talk about £10million, so if you haven't got that sort of figure it would be foolish for us just to try and get a bit of money."