The Portuguese was sacked by the west London club halfway through last season, with Roberto Di Matteo going on to lift the Champions League and FA Cup as his successor.
Upon being informed of the jibe from the 65-year-old ahead of the managers going toe-to-toe this weekend, Villas-Boas sent his own barb at Redknapp.
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"It’s a different type of club. You have to experience it and then you have to survive in it."
The former Porto coach went on to dismiss further questions regarding the Englishman, saying: "No. I have never spoken to him," when probed by journalists.