Former Liverpool and Chelsea midfielder Boudewijn Zenden is training with Sunderland but there appears to be some confusion as to the club's intentions regarding a possible transfer.
Zenden, 33, is available as a free agent following his departure from Marseille at the end of last season and has linked up with the Premier League club for an undefined length of time.
After joining Chelsea from Barcelona in the summer of 2001, Zenden spent two years at Stamford Bridge, Middlesbrough and then Liverpool before joining Marseille in 2007. His father and agent, Pierre, believes a move to Sunderland is very much a possibility.
"Sunderland would like short term to strengthen the midfield and Boudewijn is a serious candidate," Zenden senior told Voetbal International. "In the past months he has been very strict with himself and has worked six days per week to keep in shape.
"Sunderland know who he is and what he can do so he has no need to prove himself. They want to see him doing it and it just depends on medical tests."
However, Sunderland appear to be less convinced that Zenden is a realistic option to strengthen the squad, with manager Steve Bruce telling the club's official website: "Bolo has joined us for a while and will train at the academy for a few weeks as he looks for a new club. He clearly has a first-class pedigree as a player so it's great to have him here."
Zenden also attracted interest from Portsmouth over the summer but failed to agree terms with the club, while Blackburn Rovers and Hull City were also reported to be suitors of the Dutch international.