Sunderland boss Sam Allardyce is determined to buy in January.

Top of his shopping list is Schalke defender Joel Matip.

The Sunday Mirror says along with Matip, he has also sent scouts to see Utrecht striker Sebastien Haller and Hoffenheim forward Kevin Volland.

Sunderland owner Ellis Short is refusing to throw cash at the problem, causing Allardyce to be creative in the market.