Portsmouth have increased their bid for Celtic midfielder Stilian Petrov.
The 27-year-old Bulgaria international midfielder is keen to move to the Premiership club but Celtic rejected Portsmouth's initial offer.
Pompey boss Redknapp said: "We decided to give it another go with Stilian because I'd really like to get him.
"It is entirely up to Celtic what happens with the bid and I wouldn't tell them what they should do. I would very much like to get a deal done."
Petrov is under contract until 2010 but has submitted a transfer request and has made public his desire to play in England's top flight.
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