Injury blow for Burton
By Alex Livie
Last Updated: 01/01/70 1:00am
The striker picked up the injury against Grimsby, but it went undetected until he suffered a reaction during the win over Brighton.
Burton is looking to earn a permanent move to Fratton Park, and Redknapp has left the door ajar for when he returns to fitness.
Redknapp said: "I would like to keep Deon, he has come in and done a good job for us."
The former West Ham boss revealed at the end of last week that he was looking to keep Burton provided Derby release him on a free transfer, and the Jamaican will now have to return to fitness before finding out his fate.