Chelsea and Arsenal are keeping tabs on Newcastle striker Obafemi Martins.

It's been revealed that the Nigerian's Toon deal carries a £13 million buyout - which has left Magpies boss Sam Allardyce stunned.

The Daily Mail says Chelsea boss Jose Mourinho and Arsenal counterpart Arsene Wenger are known to be admirers of the Nigeria international and continuing speculation over the futures of Andriy Shevchenko and Thierry Henry does not help matters on Tyneside.