Aiyegbeni Yakubu has missed Middlesbrough training this morning.
It is understood the Nigeria international did not train with his team-mates either on Monday or Tuesday, further fuelling talk that his days with the club he joined from Portsmouth for £7.5million in July 2005 could be drawing to a close.
Boro were not commenting on Yakubu's situation, although manager Gareth Southgate has repeatedly insisted he is not for sale.