"As far as I know Steven Pienaar's contract is agreed, it's all done," he told the club's official website. "I think it's his agent's money that isn't agreed.
"As far as I know everything has been done for a while, so I think it is to do with money for the agent. Steven has done well for us.
"Since he came back from the African Nations he hasn't reached the standards he reached prior to that but that can happen.
"He has picked up one or two injuries which haven't allowed him to get a head of steam. Steven is one of the reasons our football has improved. He is a really good football player."