Nigeria international striker Chinedu Obasi is on trial at English Premier league side – Sunderland.
The free agent who was surplus to requirements at Bundesliga side Schalke last summer after Di Matteo took over, has been training with Sunderland.
New Black Cats coach, Sam Allardyce intends to decide next week whether to offer the 29 year old a contract.
Obasi made just 10 Bundesliga starts in three years at Schalke 04.
Allardyce said: “He’s been injured with a broken shin and that had taken a long time for him to recover, and he spent some rehab time in America.
“His agent got hold of me and said he was worth looking at based on his CV, which looked pretty good, so we’ll make a judgment early next week.”
Sunderland currently have one space available in their 25-man Premier League squad, which could be filled by a free agent.