Former AIG honcho Maurice “Hank” Greenberg upped his decades-old grudge match against Eliot Spitzer — just as the former Love Gov and state attorney general faces Democratic primary voters in the hotly contested race for city comptroller.

Greenberg filed legal papers on Monday opposing Spitzer’s motion for a judge to toss out a defamation suit that the ex-American International Group chairman filed against him in July.

The case — being heard in Putnam County state Supreme Court — centers on statements Spitzer made about Greenberg after he and others investigated AIG over questionable financial transactions.

In sum, Greenberg’s lawyers argue that contrary to Spitzer’s statements, the former exec had not committed fraud and was not ousted from the company — he retired.