Alan Dershowitz wants a recording he claims will exonerate him returned from a forensic analyst — saying he’s worried the tape could be ruined if subjected to too much testing.

The cassette in question allegedly contains statements from attorney David Boies undermining his ex-client Virginia Roberts Giuffre’s claims she was passed to Dershowitz for sex while being trafficked by Jeffrey Epstein.

The Harvard law professor and noted appeals lawyer previously agreed to hand over the tape for testing as part of Giuffre’s defamation lawsuit against him — but wants it back now that Giuffre wants two additional forensic firms to take a look.

“The microcassette is a piece of tangible evidence that is subject to possible erasure, breakage, and exposure to the elements,” Dershowitz lawyer Imran Ansari wrote Monday to Manhattan federal court judge Loretta Preska. “Mr. Dershowitz has understandable reservation with the transfer of the microcassette between multiple third-parties.” Preska has yet to rule on the request.

Though the tape has never been made public, Boies allegedly tells Dershowitz on the call his former client is “wrong… simply wrong” about their encounter.

Giuffre sued Dershowitz in April, after he publicly blasted her as a liar for claiming they’d had sex.

While Boies and his firm have long represented Giuffre, Preska ordered them removed from the case last month following assertions from Dershowitz that he intended to call Boies as a witness.

Giuffre has since retained noted Washington D.C. lawyer Charles Cooper.