Chelsea want to sign Celtic's Moussa Dembele for £40m
Dembele is in London to see a knee specialist today, although he has also been linked with a move to Chelsea.
Celtic want £40million for their striker, who only joined the club in the summer.
Blues manager Antonio Conte has already tried and failed to land Celtic's goalkeeper Craig Gordon.
And Redknapp believes former Fulham star Dembele should also remain in Glasgow.
Chelsea target Moussa Dembele boards flight to London
Tue, January 31, 2017
Celtic striker Moussa Dembele has been spotted on board a flight to London on deadline day amid rumours of a move to Chelsea
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Moussa Dembele has been spotted on board a flight to London on deadline day
"When he went to Celtic we were surprised because he was such as talent at Fulham," Redknapp said on Sky Sports.
"Is it a god time for him ago go to Chelsea? Maybe not.
"He's having such a good time at Celtic. Go and enjoy it, go and win the league there.
"Maybe what Chelsea should do is get the first refusal. Be the team where he goes next."