Assembly (30) of a preform (32) and a station (34) for hydroforming a container from the preform, wherein: the preform has a neck (44) extending along an axial direction (D), the neck comprising a support ring (46), and a finish (48), the station comprises a mold (36) in which the preform is placed, the support ring being in contact with a support surface (56) of the mold, the station comprises an injection nozzle that is movable along the axial direction with respect to the mold from a retracted position to an intermediate position, wherein a contact is established between a first contact surface (72) of the nozzle and the finish, and further to an injection position, wherein a second contact surface (74) of the nozzle abuts on an abutment surface (76) and the neck is axially compressed between the support surface and the first contact surface, the first contact surface being less deformable than the neck in the axial direction, and the station is adapted for injecting a liquid from the nozzle into the preform when the nozzle is in the injection position, and the abutment surface is fixed along the axial direction with respect to the mold at least during the injection.