Newcastle United boss Sam Allardyce has been taken aback by the buyout clauses contained in the contracts of strikers Michael Owen AND Obafemi Martins.

The Independent says the existence of the agreement in Martins' contract - the Nigerian is available to any club willing to pay £13m for his services - has infuriated Allardyce, who was unaware of the clause when he moved to the North-east. That anger has been heightened by the fact that it has become public knowledge that Owen can leave if a bid of £9m is lodged for the England forward, following Newcastle's failure to qualify for Europe next season.

It is understood that Martins is agitating for a move, especially as he did not receive a substantial signing-on fee for joining Newcastle and because he has fallen out with the agents who previously represented him.