 King Ladislaus of Naples appointed Nerio as his vicar-general in Achaea and in Lepanto in 1391, but Ladislaus had no authority in the principality.Amadeus of Savoy sent envoys to Athens to secure Nerio's support for himself.On 29 December 1391, Nerio recognized Amadeus as his suzerain in return for a promise of the restoration of his Achaean estates, but Amadeus could never assert his authority in the principality.