Sheffield United manager Kevin Blackwell has stated that former defender Rob Kozluk should not expect any favours as he goes on trial at his former club.
The full back spent eight years at Bramall Lane before leaving for Yorkshire rivals Barnsley in 2007 following the Blades' relegation from the Premier League.
After three years at the Tykes, the 32-year-old has left Oakwell after his contract came to an end, and is hoping to impress Blackwell, who was assistant to Neil Warnock during Kozluk's initial four years at the club.
Despite knowing each other well however, Blackwell admitted that Kozluk would have to impress him if he wanted to come back to the club where he spent much of his career.
"I'm looking to make a decision purely based on football and there will be no favours for Kozzy because I have known him before," said Blackwell.
"But if he can shape up and do the sort of job I think he can do then we can sit down and chat. If not, then I'm happy to help him get fit."